While I don't think there will be an internal upgrade, apple will replace the battery. So while the first adopters on this forum may upgrade when it is possible, that watch that they upgrade from is going somewhere and someone will put a new battery in it in a year or two. With no added cell phone charge and iPhones ubiquitous, how long will each watch stay in circulation when nearly everyone can get some use out of it? Certainly the SS should be rugged enough to basically look fine a decade from now. But will the crown or button fail way before that? Other parts that might fail? It seems a software incompatibility might be the thing that actually kills a watch. If your modern cell phone won't connect to it, then I think you won't wear it. But as long as it syncs with apps it seems like someone will want to use it.