Taking pictures with your apple watch would be pretty cool. instead of a stupid selfie stick set your phone up and then press the camera on your watch and snap there goes a pic or two
I'd be shocked if there wasn't an app available for this at launch. I haven't gone through all the watch APIs, but I do know that there is 2-way communication, and phone apps are already allowed access to the camera. And I agree, it would be neat to use your watch to trigger the camera shutter.