Full Dive Technology

I watched a show that someone recommended called sword art online recently and found that it is basically the future of video gaming... We also see this same kind of tech in movies like the matrix or James Camerons Avatar... but more realistic. I have talked about the oculus rift and the omni before being both very early versions of putting yourself into a video game but when I went looking for more information about such technology I have found out that this technology is already in the works of being made like the Electroencephalogy which is a machine that maps human brain electronic emissions and makes it so you can control a computer just by thinking.

 Electoencephalogy Machine

 This would mean a technology that would allow someone to transfer their mind into a video game/world and be connected to a personal in game avatar. We see this already with a headgear that can control a quad copter

Puzzlebox Copter Video

The oculus rift to control what we see so who's to say both can't be integrated into a single headset where you simply just lay down and play a game with your mind.

I know it sounds bogus but we have the beginning stages of this technology and I seem to think it is completely plausible in this life time and there are already companies and groups of scientists trying to tap into this technology. If this technology was even made possible the applications could/would be endless and I am borrowing from the show here as an example but *spoilers* There is a character in the show who has a terminal illness and instead of living her life in pain she lives it in this full dive world where she can meet people and not be bound to the limits of a hospital because it is online...