Actually, this is brilliant! If Vegas runs well on a Mac... crap, I'd consider giving it a shot. I really like some Mac applications (Motion comes to mind) but never liked them enough to actually go a buy a second machine just to run them.
Okay, it sounds like a boot loader much like what you use to dual-boot other unix/windows systems. Like Linux, of course.
Of course the nice thing about it is that it should be a fairly easy tool to break up the disk into two partitions and to set up a boot loader.
For that matter, I suppose you could load a Linux system onto another partition if you happen to be developing for Linux.
Okay, so you can shut down the MacOS and reboot to Windows, and then run Vegas. The next question is whether you can get a virtual windows machine running within your MacOS so that you don't have to shut down and reboot. Linux does this through Wine (supposed to stand for "Wine Is Not an Emulator"). Wine allows you to run some windows programs on the linux desktop but you aren't actually running the whole windows OS.
I think that because the Wine team is small and lacking a lot of funding they have a hard time keaping up with Microsoft. And because Vegas relies so much on Windows I don't expect it to run well in a window on a foreign OS.
The new Intel processors are touting "Virtualization" as a feature and I'm assuming this will relate to running Windows in a window on MacOS. What I've read seems to talk more about running Linux in a Window in Windows. Time to buy more RAM...
What Apple is probably doing to lock it's OS to it's hardware is the same thing that HP and Dell and everyone else has to do with Windows. They create an installation package that is tied to information written into the motherboard's DMI area, kind of like a tattoo (or like a brand used on cattle). So you just can't install the MacOS unless your system has the right info in DMI. But this doesn't prevent you from installing another OS onto another disk or partition. All you need is a boot loader to allow you to choose the volume to boot from. And of course the other OS needs drivers for all the hardware.
It'd obviously be very convenient if you didn't have to reboot the Mac to run Windows. And it'd be convenient to have a few Mac applications available, like Live Motion, I suppose. I very much doubt that you'll see Vegas running directly on the MacOS desktop but I'd be quite happy to be wrong about that.