as for the question nad ..

although Kevin Warwick is a self publicist but he has some good points, short of giving your total self to a machine to run you and only have virtual stimulation provided to you i dont think it wouldn?t be widely accepted, in my opinion people would gravitate towards the idea that grafting machines to us, so we are ultimately in control, we like control and to give that up would be a very touchy concept for most people, it would be better to use them as tools instead of getting piggybacked through time my them, I would rather be out looking and doing stuff in the real world, even thought it can be simulated with in a computer.
But really there will come a time where grafting devices to you eyes and ears becomes custom even a brain upload could be possable with the way technology is accelerating

as for aliens there in the billions adnd billions of stars have to be a planet like earth able to support life if we are then only life i feel sorry..