Everyone knows about LiveCDs by now. At least I think they do. Well, here is a system based on VMWare's excellent technology that allows one to run different virtual machines for any purpose. They have Haiku, Linux and other virtual installations for download now and it seems as if developers are working hard to make more. There is even a "Christian" edition of Ubuntu GNU/Linux and a child safe desktop.
It is worth checking out. This is one possible shape of the personal computing future.