One thing I noticed in several videos I watched is that the user needs to apply toooooo much force just to open it. And there are two hinges, so two movements for the user. It's too much complicated just to open it and adjust the angle/position. Opposed to a notebook which is much easier and fast to open/adjust and close several times all day long.
The iPad with this keyboard looks clumsy, it's like a duck. The duck tries to do three things: fly, run and swim, so as he tries to be everything, he ends up not being good in any of those three tasks in particular.
A MacBook has that thin and elegant aluminum chassis with the screen firmly attached to it. It can not do everything, but what he does he does very well.