only about 40% of people wanting AW3 want wifi version. If you go line up on 9/22 at the store, you will probably be able to buy one. But if you want a specific color combo, you would be better off preordering. Apple could throttle the inventory to give an impression that they are selling really fast and make the wait time longer the following morning on the 15th. But I doubt it. Apple watches are still no where near iphone sales number.