It shouldn't be a feature war
All the discussion of which OS has more features or where they were inspired is insane. First, both MS and Apple are notorious for stealing other people's ideas and commercializing them in their products (um... GUI, the Mouse, tablets, etc.).
An OS has one primary purpose - act as a platform on which the applications can run. The embedding of "features" into the OS is good for the casual or unsophisticted user, but most advanced users will ignore an OS' attempt at a capability if there is a better commercial app to do the task.
Given the primary objective of the OS is to run apps, OS X still wins by a long, country mile. I don't care what number release Windows is on, until they rewrite it from scratch, using something akin to a Unix kernel (a la OS X) then it won't be as stable.
I've run OS X for years and can count on one hand the number of kernel panics that I've experienced compared to any version of Windows which, due to it's fundamental architecture of needing separate drivers, info files, etc. encounters seizures (that dreaded blue-screen-of-death) on a regular basis. Sure, Windows 7 was a dramatic improvement over XP and prior releases, but I wouldn't put 8 on a machine in my business under any circumstances. Why they think I'd believe they got it right, just by skipping a release number is beyond me.
I'll adopt Windows technology when they release an OS that can go for 4-6 months without a restart (and zero failures) like OSX routinely does.