Id settle for a more widespread stereoscopic 3d capability in modern games. The Avatar game was absolute "dung" (story wise), but it's programmed-in 3d capability was rather intriguing.
Full immersion would be interesting to try, but I do have to say that there are LOT of things i interact with in games that I would NOT want to feel... and actually, the raw tech is already there for a full immersion setup. You would need multiple 3d projectors to create a virtual 3d display and a custom suit to mimic touching (I figure something like thousands of tiny electromechanical solenoids to mimic the correct pressure on...say...every square millimeter of skin).
It would cost a small fortune; the gaming experience can be made more realistic, but until tech advances to the point that the cost-per-unit drops to acceptable levels, more realistic gaming is a bored millionaires game. We just have to face the fact that a $30 controller will almost always be more prolific than a multi-thousand dollar VR gaming setup.
