>>7608
My bet: augmented reality. Visuals and sounds indistinguishable from reality. For some games and many applications, visuals blended into, modifying and/or merging with reality.
Geocaching and other location-aware games set in realspace, or any environment you want in your own room.
And of course, viruses which cause consensual hallucinations, or subtle distortions in visual reality to drive you insane. Or which overlay a hazard with something safe, like making a busy street seem empty. With music playing, or even active noise cancellation, to drown out the noise...
Gonna be fun.