More FUD about the disk space issue... yes - there is a large recovery partition and yes - you can delete it to free up space. Any yes - perhaps MS would have been better off if they included a USB drive for recovery purposes (although I imagine trying to walk the average user through "booting from USB" to restore their partition would be a support nightmare). This is just like the "omg - the desktop is gone and all…
When the best way to defend your new OS is to say "You can do this and pretend it's just like the old one!" you're probably in for a hard time. The surface pro seems to be a weird use case. It's going to come in at a price point where you could get a mid range Windows 7 laptop and an ipad mini or Nexus 7 for the same price and the combination of these 2 devices is probably more useful.
Isn't this a best practice for UI overhauls? Whenever Google changes Gmail that's exactly how they handle it.