I have been keeping up with the "schedule a try on appointment" utility on the Apple store since the preorders began for the watch. From what I have seen, Apple has consistently allowed people to schedule a try on in 3 day increments including the current day. Then the next day it would update with more chances to try on more watches. It is now Wednesday 22Apr and there are no available appointments for the 24th of April! My guess is there is still significance with the 24th of April. We will either see try on appointments open up tomorrow for the 24th or there may even be an option to purchase with in store pickup. If neither of those end up happening, there may just be models that have been set aside for in store sales and Apple is still expecting lines to form.