You can actually get a Windows RT tablet and do some work, if a majority of your work entails Office, which for many consumers and typical people and students, that mostly it. Heck, that's the prime reason why one would by Windows RT tablets: Office.
I do find it strange though that the RT tablets are priced high, like with the ASUS Vivo RT tablet. It's basically the Transformer but with Windows RT on it and costs about 200 more. I read that the keyboard dock is free if you buy the tablet until December 31st from ASUS. I call BS on the pricing structure on Windows tablet PCs altogether. I think it's because the OEMs are trying to make the argument that their tablets are the best of both a PC and a tablet, in a nice feature rich package. To buy a decent tablet (ipad) and a decent laptop (one that is about 600 dollars), it would cost less to buy a Windows 8 tablet PC. You have two in one. Honestly it's decent argument to make, but gee. 800 for an Atom powered tablet? Methinks not. But a 1,000 for an i5 powered tablet? Maybe?