@vesuvius:I think that's a good point, but at the same time, Windows RT is blasted because you can't use it like regular Windows. Apparently, at least the option to use it like "regular windows" is what even tablet users want. While a different branding would be a good way to change people's expectations about it I think it'd lead to an 8/RT level of confusion if the "XBox tablet OS" turned out to run Windows desktop apps as well, and "why can't Microsoft integrate their offerings" levels of outrage if it didn't.
Again, it's a complex problem.
The problem with the Surface, however, isn't complex. That device being so ridiculously hard to come by is profoundly idiotic.