I have Ubuntu running in Virtual Box on Windows. I love the possibility to have both OSes running at the same time to quickly switch from one to another. But I would also like to have a physical version of Ubuntu, so I can get full 3D acceleration, access to all my RAM, enjoy my dual screen (maybe possible with VBox, didn't try yet), etc.
I know it's possible to do some physical machine to virtual machine transfer, but is it possible to have a synchronized copy? I would therefore have the possibility to boot on Ubuntu or Windows, and if I choose Windows I can still run Ubuntu from VirtualBox.