I do think that this is quite an awesome idea. It's feels like it comes from an alternate universe, where humans chose a different route to take. Today (and in our current universe, hehe) it would take quite a bit of getting used to, due to the completely flipped layout.
It's very creative, and it has been designed very well.
That's also true - I find myself doing it all the time. I actually put it into practice at work. I'm constantly moving the task bar to another side of the screen. Though, with Win8, that darn start button is always on the bottom left. Which I could move that too.
I agree with that - designers should always make the best use of screen estate. The reason I like your concept is because wide-screens are really designed to add extra horizontal space. And so, we find ourselves with all the extra white-space in the explorer area. Having that 'toolbox', as I like to call it, on the right really does make good use of that space.