VMware is a virtual machine solution which allows you to run an OS on top of another OS. So it's like a PC in a PC. But VMware made the next step with Fusion for Mac. Now the applications can be taken out of the virtual machine, and integrate perfectly with the Mac's OS X. Now imagine this feature on linux! If they will adapt it for it, it's going to be one of the biggest breakthroughs in linux technology yet! At least for the normal desktop user!