To be fair, the iPad (and Android tablets) with a keyboard provides similar flexibility, but I think the desktop paradigm is what is missing.
My wife needs a new laptop, but only because she requires access to these legacy apps. Going into "legacy" mode for this, but providing the mobile consumption experience and productivity of a convienent keyboard is a killer combo.
I'm actually fairly impressed with the promise of the Surface. I might go as far to say this will be what people will be carrying in 5 years or less.
I carried a blackberry for 5 years (and sent dozens of emails a day from it) but I've never particularly found that switching to a glass screen on iPhone and now on Android impacts my ability to compose messages. Most of the folks I hear complaining about screen keyboards are still using hardware keyboards and haven't used both methods for any extended period of time.
Touch is for media consumption, not when you need to get something done.