The iPad doesn't come with a BT keyboard, but there are quite a few keyboard/cover combos available. It's not something that you have to "schlepp around inconveniently":
http://reviews.cnet.com/8301-31747_7-20091329-243/keyboardin...
http://reviews.cnet.com/8301-31747_7-20091329-243/keyboardin...
The Touch Cover is a sanctioned, obvious choice. It's simple to grok. The iPad doesn't have that yet.
It doesn't even matter if the clunky-looking ones perform better, or serve an edge case better.
This is Microsoft learning from Apple. What you're doing is a role-reversal of the situation where anti-Apple folks point to some obscure niche solution as equivalent to Apple integration.
Look, I'm not cheerleading Microsoft here: I'm a Linux desktop developer. If anything, I'm saying these things with a tinge of resignation (not about Microsoft specifically, but the way the market works - though I prefer to accept it as reality, and see it as a challenge).
Now, one thing that might be true: A sanctioned solution leaves less room for accessory makers, so that Siberian Dvorak keyboard may be more likely to be available for the iPad than the Surface, leaving the iPad as the obvious choice for Siberian Dvorak users.
[1] http://www.suntimes.com/technology/ihnatko/13263622-460/micr...