IMHO: The Macbook (the small one, that was killed) made more sense than these iPad + keyboard attachments. You had a one, slim package that was easy to use on lap and carry around with one hand (even if open). It was able to run normal software, there was no need to resort to hacking to do for example software development. The negative thing with Macbook was the price point. It was a bit expensive to have as a second…
BTW I could not find the weight of these trackpad keyboards, and I looked. Weight is an important feature and should be listed.