I would not use the 'out in public' amount of SS Apple Watches to gauge launch day appeal. I think many big Apple fans, like you'd find here on Macrumors and at the Apple Store on launch day, much prefer the SS model. I certainly do. It has irked many that it must come with cellular and only specific bands, but that hasn't seemed to really stop people from buying them. And like other's have said, it's unlikely a store gets many, and I don't believe they'll have a separate line for iPhone XS vs Apple Watch buyers, so you're likely in for a wait. Finally, even if people don't actually want the Apple SS to use, you'll certainly have people buying them just to resell because they're so constrained. If you care enough, it may be worth a shot, and I wish you luck.