Silly not to allow bluetooth. Apple doesn't even sell non-bluetooth mice. Typical Tim Cook Apple decision this
Lol, we don't even know if it's actually coming, but you know 1) it won't work with bluetooth and 2) that it was a Tim Cook decision in any way
My guess is that it will work with bluetooth mice, just like iOS devices can work with USB or bluetooth keyboards. If not, I'd just use a 2.4 ghz wireless mouse which are pretty much everywhere *shrug*. It also means a keyboard maker could include a trackpad that communicates over USB.