A technology that would be good for those that are unfortunate enough to suffer from a potentially crippling disability would be the studies of brain waves that they are using for potential future prosthetic limbs and to help people communicate. The mind is a powerful thing. There are studies and prototypes of people being able to move prosthetic limbs just by thinking it. Could you imagine playing a game where you actually had to use nothing more than your mind to play? Better yet, can you imagine how some of the current gen games could be enhanced beyond our wildest dreams by using this type of technology? At this point it doesn't just become a different way for people to play games, it also becomes a tool. With this type of device you could reenact possible real life scenarios (like real military training, flight simulation, driving simulation, etc.)
Oh the future will be great especially with as far as we have come just in the past 150 years of human existence. Too bad we will not be around to see the even further advances that will be made in the next 150 years. Things like this can be used for so many things, and not just gaming. Say you strap a person into a mental flight simulator. You can tell what areas a person would need to work on just from thought reaction time. You can teach defensive driving with simulated crash scenarios that can create better drivers while also keeping a person safe. It will eventually lead to being able to help paraplegics walk, giving back limbs that may have been lost to do injury, infection, or birth defect. It will also help the mute be able to speak.
The human mind is a powerful thing that has helped us better human life. You may say the devices are what do this, but without the power the human mind holds, none of what we knew, know now, or even imagine for the future would or will be possible. Just imagine what the world would be like if people didn't dream, have imagination, or lacked creativity.
I can see stuff like this having much more benefit than just gaming, but if it helps a child to smile because they are having fun playing a game, or enjoying an activity that normally they were physically incapable of enjoying, even though they have no reason to smile or be happy because of the hand life dealt them, then I say the ultimate goal was accomplished.