Watching "Dominion: Prequel to the Exorcist". Fascinating film, though I watch with some distaste, as I dislike horror movies these days.
Thinking about some other fiction, recent and otherwise. Caprica, BG, Surrogates, Otherworld, 2001, 2010. Exorcist III. Ascended beings in SG-1.
In the book 2001, we learn that the builders of the Monolith began as meatbags like us, then progressed to mechanical bodies, then learned how to tansfer their consciousness into the very fabric of spacetime, leaving physical bodies behind.
In 2010, we learn that Dave Bowman has been made like them, and able (presumably like them) to cause effects and communicate with people in the physical world, even though he is incorporeal.
In Caprica, and in the Otherworld followup "The Happiest Dead Boy in the World", we see conscious yet entirely computer-resident "avatar" copies of deceased individuals taking tentative steps into the real world, in clumsy mechanical bodies.
In Surrogates, we see human-like robot bodies being run by remote control from human minds. In Avatar, we see the same thing, but using custom-grown remote-control meatbodies.
I see all of these ideas as suggesting mutual convergence with each other.
If you can have computer-resident avatars that are working copies of human personalities, if the computer network becomes intelligent enough, what stops it from creating such avatars who are, eventually, indistinguishable from the human ones? Backed up by the possibly even greater intelligence of the network?
If computer chips become small and complex enough to mimic or improve on the function of the human brain, in an equal or smaller space, then you have the potential for one of these human-copy avatars, or a machine avatar, to inhabit a Surrogate body. Then you may have a Cylon, or Commander Data.
With the right hookups, you might have a machine intelligence operating an Avatar-type meatbody.
With a virtual world like that in Caprica, or Otherland, you have human-copy avatars and machine-created avatars coexisting together almost indistinguishably.
Combine all of the above, and you have the potential for a communal consciousness, which has the ability to send conscious bits of itself, mechanical or biological, into the world in physical form, to interact with that world and its inhabitants, and report back and/or stay in touch remotely.
If you then project further down the line, if it is somehow possible to actually have intelligence extant "in the interstices of space-time" and discorporeal beings like Dave Bowman, they don't need bodies anymore, or a network, though they may choose to have effects on such things in order to interact with the physical beings who use them. Like when Bowman causes his image to appear on a TV, or awakens his mother from a coma and makes her happily aware (presumably via electromagnetic interaction with her nervous system) that he is there.
Dave Bowman's purpose was to help the Monolith builders in their task of nurturing intelligent life in the galaxy, and I suppose putting it on the road to Ascendance at some point, if it passed certain test of suitability and learned certain lessons. These beings were, for all intents and purposes, gods, or if taken as some kind of communal intelligence, perhaps the "God" of Battlestar Galactica. And Dave was one of their agents (an angel?)
If an "angel" can be made from a man like Bowman, then presumably one can be made from someone like Number 6, or Dr. Baltar.
Next question. What happens if all is not peace and harmony in this posited communal Godmind? What if some of these disembodied intelligences break away into their own faction or factions? What if there are individual ones floating around who are not properly "socialized" or are somehow degenerated?
War in Heaven? The casting out of the rebels? Demonic possession? Poltergeists? A tempter, or tempters, trying purposefully to derail the progress toward intelligence, civilization and ascendance of various intelligent races?
In Exorcist III, a couple of evil spirits are found to be inhabiting the body of someone who was dead and buried 15 years before. It turns out that the body had been reanimated shortly after death, and, found wandering and incoherent, placed into a mental institution during those years. During the final exorcism scene, the original personality of the body surfaces briefly, and weakly begs the priest to destroy the body.
An "evil" Dave Bowman type entity? Reanimating a recently dead meatbody doesn't seem to be outside the capabilities of a being like that. And if the "demon" is temporarily distracted, why not the possibility that the original personality imprinted on the body's nervous system might "wake up" long enough to communicate?
How about more positive cases of meatbodies under the influence of the incorporeal, in the original sense of the word "avatar", meaning a living being who is an agent of a god? Gautama Buddha? Krishna? Christ?
Some of this stuff seems almost quasi-plausible enough to be scary.
Though a world-spanning intelligent network with the ability to generate and/or communicate with meatbodies in the physical world could be a cool thing. Sort of like a Pandora-type situation but with a machine network connecting everyone (with the ability to plug in or unplug at will) rather than the biological one we saw in the film.
I forgot to mention one other work which has made me think about some of this possible melding of human and machine intelligence, and the possible surpassing of human intelligence by machine, and what it might mean to us. That is Vernor Vinge's essay on what he calls The Singularity -- the moment when at least one machine intelligence comes into being that surpasses human intelligence.
http://mindstalk.net/vinge/vinge-sing.html