Popol99 :
That sounds awesomely scary... What would the advantages be ? And the downsides ?
Advantages:
You have control over what resources the VM uses, so it doesnt hog all your power.
If you change computers its very easy to just move the vm hdd file and have the vm running on totally different hardware in minutes.
You can be running a Linux or other OS at the same times as running windows, or multiple versions of windows without having to have lots of different computers.
You can run legacy OS and apps on new hardware - i.e you can run windows 95/98/DOS on a VM and play old school games or applications.
Downsides:
Theres a little performance overhead if you use applications (type 2) hyper visors like virtualbox or vmware player.
You wouldnt really want to play modern games on a VM, except old games, but great for hosting servers etc.