Jason Snell, writing for Macworld:

I can’t imagine a future Mac laptop with an iPad where the keyboard should be, but with a few additional bits of technology, it seems a lot less wild an idea.

As someone who enjoys typing on a physical keyboard, I’m vaguely nauseated by the idea of a keyboard that’s just a sheet of glass–but the travel on the MacBook Pro keyboard is so small already, would it be that different to remove it altogether?

And:

You can’t operate a touch-screen keyboard by feel, because the act of feeling it causes it to react.

Unless you built in pressure sensitivity that would allow that surface to react differently to hard typing taps.

By a long, long shot, I prefer a physical keyboard to one presented on a sheet of glass. As Jason says, it’s all about feel. Is it possible to use taptic feedback to improve a touch keyboard to the point where it approaches the feel of a physical keyboard?

Interesting read.