I don't know about virtual worlds. Video games have done well and will continue to exist, but I'm not sure virtual businesses will actually come out to be as popular as people say.
There could be a major trend away from virtual worlds in an aim to help people spend more time in nature, outside caring for one's health. Maybe, maybe not. Personally, I spend too much damn time in front of a screen and wish I didn't have to do it so much.
We'll just have to see I suppose.
RE: Virtual Businesses: Hundreds Trillions Of Dollars Are Going To Be Generated