It IS a niche market but if someone wants a very light touchscreen ultrabook that can also be a tablet, Surface Pro will probably be quite nice. The digitizer is also something that makes it different.
I'm quite tempted to get one. I've never owned a laptop/notebook/netbook/ultrabook/tablet or even a touchscreen device so it would be nice to get something like the Surface Pro that can be used is various ways. It's a shame it's so expensive. Maybe another manufacturer (like Lenovo) will come out with something more tempting at the same time but cheaper, who knows.