I don't think the SE will be upgraded every year. I can see the SE2 not come out till 2018 or 2019. I just don't think Apple thinks the 4" is mainstream anymore....and going forward I see even fewer people wanting a 4" phone, because first time SE buyers will probably upgrade to the 4.7" or 5.5" phone next time around if price is not a factor and they want to stick with an iPhone.