And how would it work, all watches running identically? I think I would rather one good watch, where I can swap the bands out.
I would think that would be the ideal situation for someone who wears multiple watches. So it doesn't matter what watch you throw on, it runs identically to the rest. But I imagine each watch could have its own settings panel too.
With all due respect, many people here seem to focus on their individual needs, which is fine, but there is a larger world out there. Apple has clearly demonstrated now that the Watch is targeting luxury fashion watch people. Those people generally have more than one watch for different purposes, or merely because they collect them. Many people in general have more than one watch, even if just inexpensive Timex watches.
In my case, I currently have a silver Sport. Eventually I'd like a nicer stainless Watch, and I'd like a gold watch like the Edition (but a lower-priced gold clad mode). Just switching the bands on my Sport isn't enough to "dress it up", never mind that there are currently no "nicer" bands with hardware that match the finish. And what if someone wants a silver and a gold Sport to coordinate with different outfits? Swapping bands isn't enough. Or what if someone wants a black watch every now and then? And realistically speaking; I used to wear interchangeable grosgrain watch bands, I had about a dozen of them in all colors and styles -- but guess what, After the initial purchase of a new band, I rarely ever switched them up. It was just too much trouble when I was running out the door. And there were a few times when I left my gold watch at home because I was wearing silver belt buckles, rings, bracelets, and or eyeglasses. Then there's my old sport watch, which matched my gym clothes much better, or just looked sporty when out casually, not to mention more durabl than the link band on my Citizen for swimming. One watch cannot cover every fashion requirement or event, not even the Watch. I regularly use my Sport in the water, and I realize I'm pushing my luck with it. If I needed my watch on a daily basis, I'd want two now so my daily wear watch wasn't being subjected to my water exposure. Moreover, I've ordered a waterproof case with its own band which I'd rather not have to remove the bands and put on every time I want to use it. And then there's the battery life ... What if when you took off your watch when you got home from work, you put on a second watch fully charged to go out, and never have to worry about waiting for the watch to charge? Many people never take their watches off except to swap with another, wearing them everywhere including to bed and showering. How nice never to have to worry about charging it.
Bottom line, there are dozens use scenarios that would make having more than one watch useful for other people. And Apple is leaving money on the table if they chose not to support multiple pairings, especially with the Editions, and now Hermes, and future co-brands.