Another reason to keep using my iphone-5s. New phones are way too big, and I love the home button. If I was forced to upgrade I'd get the iphone 7 se (the mini one)
It's rather the 6s one. Still, I hope they will upgrade it in future. Also, I'm sure they will release scaled-down version of the X in time; it's just easier/cheaper for them to release a bigger iPhone first.
iPhone SE, you mean. It's the same on that came out alongside iPhone 6S.