I'm thinking the Apple Watch will age more like the MacBook than the iPhone. With the iPhone if you're 2 generations behind I believe you really feel it. I am one generation behind and I have already plan on getting the 6S when it comes out. My MacBook is 5 years old, but I don't really miss the current features. I could sell my MacBook now and upgrade to the newest one, but I don't feel any frustrations or the "want" to get the newest one. Perhaps, it will be that way with the Apple Watch. When the next gen AW comes out it'll probably have better battery life and maybe thinner, but the AW works off the iPhone. If the iPhone is up to date, then you'll for the most part be up to date. Perhaps the AW will grow old like a MacBook and last for 5-6 years before we feel the "want" to get a new one. Opinions?