I personally find a real keyboard much easier to type on than a touch screen keyboard. Sure, the e-reader keyboards are tiny, but they are not that tiny.
Also, call me old fashioned if you will, but I like touch-less screens with real keyboards better, as I feel touching screens with my greasy fingers is not a good idea.
Sure there are all kind of advances which keep the grease off, but still it is one more layer in obstructing my view.