UPDATE: Thanks to Rob Koberg who sent this link, that point has been illustrated humorously by someone. Gotta love the web when it reacts fast and with the right spirit.
YAG (yet another gadget). As the fellow said at CNet, iPass.
How to build real-time 3D virtual reality and other things in three dimensions on the web for practically no money. "He who can no longer pause to wonder and stand rapt in awe, is as good as dead; his eyes are closed." Albert Einstein