I think it's a shame the wireless ones don't have the numeric keypad on the right, I love my wireless keyboard and the fact that it has that, I use it more than I thought I did, and it's part of the nice thing of having an additional keyboard.
I'm hoping Apple will give us the option for a full wireless keyboard later on down the line. The bonus with the current wireless keyboard would be that it is very compact and looks to be easy to travel with.
I'm now used to using an external keyboard when my MBP is office-locked, so I'm actually considering the new wireless KB for travel purposes.