Something like a Surface Pro is useful for its convenience, not its raw power, right?
What conveniences? The OS or the keyboard?
Since the Surface Pro is limited to Windows, that flushes 'convenience' down the tube. On the other hand, if you are referring to keyboard/trackpad, I already have tablets and ultralite that do not have Windows on them. I don't see the convenience there.
If I offered you a Surface that will be a total hassle to work with Linux, or a Surface that was a bit slower but would work in Linux without a hitch, wouldn't you take the latter?
Hassle has never stopped me from using Linux. Now let me be clear that I am not generalizing and speaking strictly for myself: I use Linux because I like being in control of my PC. I'm a professional developer and I dream in C/C++. No matter the hassle, I like to ensure that my computer (table or otherwise) runs the way I like--and that's usually close to the metal.
Again, the above statement is _not_ a generalization but my personal preference. I realize this is not what the vast majority of user wants.
However, this said, I would like to know why someone would want to run Linux as their primary OS in a virtualized sandbox under Windows. Seems like an expensive--and limiting way to run Linux.