I've never understood the obsession with OS.... for the vast majority of users, the OS provides the backbone to run a browser, Office Suite, Photo and Video Libraries and little else.
It really doesn't matter if it's XP, Vista, OS10, Linux or W7. What does matter is that it needs to be stadle and you peripherals are fully supported, which usually means waiting until it's been around for a while.
For me, it's the same for OS's as it for planes.... never fly anything that still has paint on the pedals.