The code in windows 8 for the normal win 7/XP type interface may not be included in the final version of win 8, so the programs to change win 8 back to the old interface will not work as they depend on the old code to be there for it to work.
Microsoft is trying to dictate to you how you are going to run your computer in the future whether you like it or not. In my humble opinion they will shoot themselves in the foot trying to do that. Personally I don't want my pc to look like a phone, it is just so stupid, I have a mouse and keyboard not a touch surface on my pc. I don't see corporate America going to the Metro interface for office work, that just don't make any common sense either.
Next time you go to a restaurant, look at the touchscreen, do you really want to look through that smeared surface all day long? Not me....
Believe me, after just trying Win 8 CP for four days, I was totally turned off by Metro. I was glad I could get rid of it, but even with the "Desktop", I hated the fact there was no Start button and that basic settings were sprayed all over the place.
In one sadistic sense, I hope Microsoft goes ahead and forces Metro onto the public, even for desktop machines. I can just imagine my doctor trying to use Metro on his examination room laptop. Perhaps(?) a river of negative feedback will teach M$ an expensive lesson to listen to the people who actually USE their software to run computers for productive work every day.
But somehow I doubt it very much. Maybe I should buy stock in the company that makes Windex to keep all the touchscreens clean?