1) linux and xp are available as well.
2) huh? laptops always have limited options.
3) not compared to a 600USD dell new.
4) I run OS X on my used ThinkPad, and Apple opened up the vitualization gates on OS X.

plus there is the MID market to consider now with the likes of the eeepc, are they laptops or not? <400USD for cost conscious consumers and children's market.