ACM Queue - Virtually Yours - Virtual Machines are back in style.
With Virtual machines one of the most interesting uses is to run old and incompatible hardware/software. So why are todays operating systems so backwards compatible. They could be so much faster (BeOS) have a technically better software, and we could run all our old apps in a virtual machine.
Games are the only thing that stick out though. Running games in a VM would probably not work.