I know that what I am about to suggest is just about as unrealistic as it can possibly be, but imagine how epic it would be. So here it goes, imagine having Oculus Rift support, and hi-def 3D map support, on roll20. That would make the experience as immersive as it could ever possibly be, having the ability to look around in the world, maybe even have 3D character models for the players and NPC's