The Surface Pro would be interesting if it weren't 2 pounds. People had issues with the original iPad at 1.5 pounds. It may not sound like a big difference but it's not going to be the type of device you actually hold in your hands to use for very long. If you can bear a little extra weight in your bag a regular ultrabook + cheap 7" tablet is just going to be a much better combination.
That's right. My wife has a wonderful Logitech bluetooth keyboard/cover for her iPad 3, that she hardly ever uses despite its obvious utility for word processing - for that reason. Its just a bit too heavy and she uses the Apple Smart Cover instead.
But for those few times in the office when she needs a laptop style device, e.g. conference room meetings, she takes the Logitech keyboard/cover along and it just magnetically snaps together with easy-to-type-on keys. She switches rapidly back and forth between voice dictation and the Logitech keyboard with a function key.