LOL. There are actually already companies who have created software to do that, or are prepping it now. They've been rolling out updates to classical Start Menu replacements that were once antiquated, but now suddenly might have a huge market.
Windows 8 is a huge bet for Microsoft. I've long evaluated their plans, and the more I've analyzed, the more I realize they do have logic behind them. However, I'm not sure if this attempted unification of touch+traditional UIs is going to pay off. The unification of OSes would, if they succeed, but they've had so few wins in the mobile space to date, that I just don't know. And considering Metro is so similar to Windows Phone.. Well. Let's just say nobody liked Windows Phone, so I'm not sure who is going to be a huge fan of Metro, even on tablets. On the desktop its a clear distraction. If only they can get people to love Tiles, darned it ;p. After all, potentially, they are cool - showing you real-time status from so many different applications or web sites on a single display.
The UI enhancements they revealed in the link of the OP here to leave me with more confidence than I had on the CTP. I do find it ironic that they rolled back so many of the Windows Vista+ Aero Effects, but on the other hand like the boldness of the decisions. They are either flying apart at the seams, or about to make a major comeback. Of course, even if Windows 8 fails, they'll try again with Windows 9. Just like they did with their search engine, until they finally got it halfway decent and in a position to compete.
They are ever so eager to toss away their legacy desktop users, the workhorses of the world, in favor of this touch screen future that offers less efficient productivity and lots of fingerprints. Perhaps they think all those years they failed trying to get tablet PCs on the market were because of their legacy support and non-touch native UI. They failed so quickly, so fast, in their previous tablet PC efforts, that many of you may not remember. These pre-dated the iPad by probably 5 years. Laptop+Touch screen combos, some you could flip around to make into a tablet, or swivel out to make into a laptop. High end stuff I never got to touch, and they didn't last long.