It's a scary concept, when a virus hits us in current computing modes, there is a certain safety implied by the solid window to the virtual world. Immersive VR at its technological best captivates your senses.. one can only imagine what a sick hacker could cause. This kind of idea is one of the many cyber concepts in Neal Stephensons novel "Snow Crash". Pick it up, it's a good read. *UPDATE* A film version of this novel is in the works, hopefully they can pull off Stephenson's metaverse convincingly.