I'm using the Windows 8 operating system. It has other advantages. In general, the desktop is faster than Win7, and there are a lot of nice improvements to Explorer. Also, startup and shut down are much faster. I don't have to use metro to take advantage of Windows 8, and while a lot of people hate metro so much they don't give the desktop a chance, it actually is a superior desktop experience to Win7 in my experience.
Yep. At it's core, it's easily the best Windows product to date. So it has some new funky abilities that may not be everyone's cup of tea - but if you have even the weakest ability to eventually adapt if given enough of a chance, it's well worth it.
It's the fastest Windows ever. The Windows NT 6.x kernel series has been extremely impressive, and great to see it just keep getting better. Vista was only marred due to the fact it was 6.0 and featured a radically new kernel/driver stack, and required significant driver rewrites and manufacturers were slow to answer that call, or at least slow to produce stable releases that played well with others.
Win7 was an absolute blessing - it was everything Vista was, made even better, and even harder to shake down with driver issues or through other means.
Win8 is faster in every way I've been able to witness, and while I miss the Aero theme, the new theme has really grown on me, and does conceivably lend a hand in giving the overall system a boost.
I was always a fan of the Ribbon interface in recent Office releases, and am very pleased and satisfied with its implementation almost universally across the board in Windows.
The new Task Manager is, alone, almost entirely worth the upgrade. It's freaking insane how much of a boon that is, and in having to deal with systems at work that are all Win7/2008R2 or older, I find myself very sad when I open up those task managers.
edit:
and we're going off topic here.
Then again, as others have said, the whole point of this thread is quite moot. It's an imbalanced comparison. If you don't want the defining characteristics of the Surface Pro (able to be used as a tablet, obviously complete with touch), then it's a completely asinine concept to even consider purchasing it. If you are comfortable with, and desire something along the lines of the MBP, then you have to consider equal comparisons for the conclusion to be just - like, comparing price/performance/features against Ultrabooks.