I posted a related thread on this a while back, with a story of a quadriplegic controlling a computer with his mind. (Admitedly it was quite primitive).
The stuff of science-fiction keeps getting nearer and nearer
I think that it is people with disabilities that will be the first people to benefit from new technologies such as these. In fact I believe that in the not-incredibly-distant-future, to have a disability will not render you 'disabled' in any major way.
The blind will see, and the lame shall walk.