Pretty certian the is marketing bumpf, Is this not what the AMD-v and intels equivilent (cant remember of the op of my head) allow.
Realy wish i kept my sources to refernace but from what i remember the different levels of virtuilisation include emulation where the complete pc is emulated and the OS sees this as a native hardware this is the Slow method and used by older desktop virtual pc applications.
Another 2 one of which I have completely forgotten the other uses a set of cpu instructions to allow the hyper-visor to present to a modified OS an interface the OS calls this and is rerouted directly to the hardware, requires different kernals if I recall available on Linux for a while and now in Windows server 2008.
This model allows for the level of migration that you would find with the fully emulated version but with close to bare metal performance, most recent opterons and AM2 athalon and phenoms have amd-v while c2d+ as well as some older P4's (some pentium D's) have the intel version.
Would love to be corrected but old hat tbh. and if not only because AMD took so long to finalise the amd-v instruction sets from one core gen to the next.