In my user experience of Sony Vaio Duo 11, I said Duo 11 might not be the best laptop/tablet pc hybrid of 2012, but since 2012 is gone, I can say that Duo 11 is the best tablet pc of 2012, even though it might not be perfect hybrid for some. Duo 11 probably will remain as best windows 8 tablet pc for a while until another new mind-blowing tablet pc release, or new CPU release. Reason for this opinion change is that the fact there’s no other tablet pc in 2012 offers similar performance without sacrifice on mobility, screen, and/or stylus, nor offering mobility without sacrifice on performance, connectivity, and/or keyboard. And interesting, Sony manage to keep these aspect with sacrifice on trackpad only, which isn’t a big deal for windows 8. Pretty much Duo 11 direct compete with Asus Taichi 21 and Lenovo X230t (does anyone remember it?) only.
While Microsoft Surface Pro sounds interesting, I think it is worse than mentioned 3 tablet pcs for business user.