But why do I have to choose?
Nice that they finally introduced an option for a more laptop type keyboard. However I don't think they've quite got things perfect.
What I'd actually like to see (from Microsoft or anyone else) is not a purchase-time choice between a laptop-style keyboard and a built-into-tablet-cover style. It'd be better if the same tablet could use either keyboard. Then it could be a decision made when leaving the house: do you expect to do a lot of typing today? If so take the laptop style. Expect to be doing less typing? Take the lighter cover.