Via Sentient Developments, here's a speculative montage of how the 21st century could play out. Personally, I think this is all very viable, given the way technology and society is developing. The possible caveat is, of course, that as humans we may screw it up through infighting, luddism, reactionary attitudes, and good old fashioned greed.
That being said, I really do hope we get there. I can't wait until 'most conscious entities do not have a permanent physical presence'. Hopefully I'll still be around to shed my skin (or what's left of it at that point) and join the singularity.