Yeap, a jack of many trades, but isn't that the point of a convergence device? I feel the inking is a small niche thing that I have no need of, but at least it gives the surface a niche.
Hopefully Haswell will bring these into their own, better gaming, better battery life, and maybe windows blue will improve on some rough spots.
In a generation or 2 I could see myself replacing my laptop and tablet with a surface pro like device, but not yet. I'll be happy to get to a 3 device rotation, my desktop, phone and whatever can be a decent enough tablet and laptop at once.