I wish they would hurry
I am rapidly running out of time and doing little on my end to help. :)
Seriously, I am a believer in the singularity but as always it may take a lot longer that we wish. No doubt when we fully understand the human brain, I would be amazed if we couldn't upload the contents.
It would seem to me that in the 4-5 hundred years we are talking about, the advances in biological science will allow the cloning of receptacles for our consciousness when the old body starts to wear out. This would give us a choice of the real or virtual life.
(be funny if all those frozen heads in Arizona have the last laugh)