I hate myself for buying tablets upon tablets. Good job,all those marketing scums. 
I use tablet only for ebook reading, occasional browsing, and some fun/game apps.
The only thing I don't like about these extremely portable devices are that they're not yet productive, mere luxury with bundled features for basic computing.  I already stopped looking around. Surface Pro sounds convincing but with that small screen I am pretty much sure I can't get productive at all, you would know what I meant if you are into graphic design and video production. It needs bigger badder screen.
For quick flips, random emails, web, gaming,ebooks... tablets are fun. More serious work, you inadvertantly get your bums in front of mighty old desktop. Thats the fact.