If you want an Apple Watch at launch, it looks like you might need to pre-order or make a reservation.
The Apple Watch will reportedly be in limited supply in Apple Stores on launch day. Most of the inventory will apparently be reserved for customers that either pre-ordered a watch, or made an appointment to try one on, according to 9to5Mac:
As one source at a flagship Apple Store said, "we're told to treat launch day as if there will be no walk-in stock." That doesn't necessarily mean there will be absolutely zero Apple Watch units to buy at launch if you don't have a reservation, just that the specific Apple Watch variant a person wants will be far harder to come by at launch than some previous iPhone models.
Supply constraints during the launch of the Apple Watch would not be surprising. During iPhone launches, the stock in Apple Stores often runs low, with online orders also slipping by a matter of weeks within hours of the device's launch.
The Apple Watch goes on sale April 24, with pre-orders beginning April 10. For those of you still on the fence about buying the watch, or if you're trying to decide which watch to get, be sure to check out the iMore Apple Watch buyers guide.