Yeah, because 3D is so much more useful that 2D for ummmm..... let me think about this one for a while. The 3D virtual world will not be coming for a very, very long time. Until we have a cheap and simple way to do 3D presentation the whole virtual world thing is a non-starter; once that appears you can start to talk about how things might, possibly, change.
And 640K will be enough for anyone. There is no point in twitter. Instant Messaging is for kids. The MP3 Player market is saturated. The million dollar homepage is retarded.
Rather than cherry picking failed predictions (btw, the million dollar home page is _still_ retarded) you should try to explain what it is that a 3D digital environment offers that makes it so superior to a 2D environment. I guess the difference between us is that I have actually worked for a failed virtual worlds company back in the day (Electric Communities) and so I know both how hard it is to pull this off from a technical side as well as how many of the things you think people might want to do in 3D are really things they will happily do using regular web and internet services.
