Just an FYI, you can make your Try-On Appointment now (for the US) if you click this link. Once you go through the steps, it may say there is an error, but your appointment has actually been reserved. I accidentally made three reservations because I kept selecting different times until I got confirmation!
http://concierge.apple.com/stores/u...=applestore://node/home/shop_watch&type=tryOn
http://concierge.apple.com/stores/u...=applestore://node/home/shop_watch&type=tryOn