I guess it would not be totally accurate to say the watch is essentially a dumb terminal (especially after native apps start rolling out later this year), but it does seem currently to have a lot in common with, say, CarPlay, i.e., being mostly a bluetooth display for your iPhone. As such, Im not sure how Apple could improve it in the next generation or so to make me want to trade up. Native apps always take a while to catch up to hardware improvements. New sensors? Im really not sure what new sensor they could add. A sleep sensor would be nice but I dont see battery life improving all that much to support 24hr wearing. Other health sensors I could imagine might only be worthwhile to the people who have a particular problem, say, with blood sugar. And Im not sure how much thinner they could get it and still have a functional digital crown. What do you think they could feasibly do to get you to trade up next year or the year after?