Decision for windows
I think Microsoft should have left windows untouched. Or may be now they should remove metro part from full windows version since no. of apps and user base is there. full windows should just run legacy app, this will enhance development of desktop environment. however a store for legacy apps like Mac's should be developed. whereas win rt/phone should be purely metro.
In this way Microsoft can excel in both professional consumer market with full windows as well as ever growing lightweight os market in order to compete with chromebooks and tablets. or may be they might have some serious plans designed from the beginning. who knows. what you guys think?