The premise is not a bad one, its just that the hardware isn't quite there yet, at least at indie developer stage that is.
Some huge micro controller producer might be able to pull off the specs, with the price needed, but none of the dev boards are going to cut it.
Like if you were to use Arduino shields for wifi, accelerometer, touch, etc you would already be looking at over a hundred dollars. Plus that much more in labor to put it together.
And thats not even looking at a decent motherboard.
On the other hand, Node Web-Kit offers a blank canvas that would actually be perfect for this kind of thing.