Been lurking on this forum for some time...but thought I'd post an interesting story that happened to me today...
Just some quick background - I'm based in the US (NYC specifically), and placed an order for the SBSS on 6/6.
I've been checking the retail store reservation site daily at 8 AM to see if I could magically get my hands on the watch earlier, and this morning, I actually managed to make a reservation at one of the stores. I did not cancel my online order (yet).
I went to the store, they brought out the actual package, but when the salesperson scanned it, it kept displaying an error. This got escalated to the store manager, and then escalated higher to Apple point-of-sale support. All in all, I waited about an hour and a half before the manager came out and told me that the watch was NOT supposed to be sold in retail stores yet, and she'd be unable to sell it to me. They even asked her to ship the watch back to headquarters.
Disappointing, as I'm sure you can imagine, but it does appear that they've locked down retail sales until they've gotten through the online backlog.
To compensate for my time there, the manager offered to comp me with AppleCare on the watch, so I guess the whole day was not a loss.