Yes, I've heard of MinWin. BTW, here's the link to that blog I was referring to: http://thebs413.blogspot.com/2005_08_01 ... chive.html
Although I appreciate the initiative to start from scratch, I much rather would have seen WinFS come along before the new sound system.
The one thing that really sucks about starting over, is at some point you can't retain backwards compatibility. And the only real option is emulation... but there can be big disadvantages to it. First is missing features and second is performance. A good example, is a game like DOOM. If you run it emulated in Windows, the amount of CPU time to do it is enormous, somtimes 100x more than what you would need to run it natevely... turning our fast multi-GHz computers into something that can barely handle code over 12 years old. Plus, you'd be lucky to find an emulator that will run your program at all.
The significance of this is really simple: If you're going to rewrite something, there benefits have to outweigh the disadvantages. in Vista MS did such a quick redo job here and there, that there's really not much to be gained. That's not the way you wanna play it after waiting five years to update your OS. All that really came out of it were steps-backwards. They'd have been better of waiting until W7 to implement some of these things, IMO.
Sorry for the rant and philosophy and all -- this might sound like I'm kind of learning this all for the first time, and I am. As I really started getting into PCs when XP first came out, the first OS I used that I really started to learn technical details about has been around for a long time. These things are going to be a big change!