Not a chance. Too little too late. Android became so dominant because it is free to the handset makers. Win8 has no reason to exist and will be a failure. And as I have said here a number of times Apple is on its way to a niche player a decade from now. It is Windows vs Mac all over again and the outcome will be the same for the same reasons
GUI and User experience is able to influence consumer. The user experience that Windows 8 brought on the table may be able to create enough momentum to get a reasonable amount of shares of the pie. Who knows! At the end, there are die-hard Apple fans; there must be die-hard MS fans.