Well, in the future MS look certain to lock-out non-MS OS's from the x86 (and successor) series hardware!
The Terron/AmigaOne PPCs are the biggest-selling non-Mac PPC hardware! Don't forget that the motherboard can be bought cheaper for purely Linux running!
The motherboard/system prices will come down as production runs >10,000 occur!
India and China are going to be the fastest growing IT markets, and its fairly certain that non-MS answers will be eagerly sought out!