Right, but if no-one picks up the torch of maintaining and developing Android and giving it away to device manufacturers, I'd imagine going with the new Google OS that they are going to do that for, would be very tempting. Most phone manufacturers haven't shown an interest in putting a ton of work into the Android, themselves, even just to customize it beyond adding some shovel-ware and maybe a theme (notable exception: Samsung)

Possibly the app ecosystem will survive, even if the OS itself withers into obscurity, provided Fuscia can run Android apps (seems likely, but I haven't kept up with news on that sort of thing)