It will probably have 2 gig of ram and force touch, better camera, iOS9 (which might end up being the best iOS yet. Seems like all of this might be enough of an upgrade to just call it iPhone 7.
That...sounds like an S upgrade (Supgrade?). S upgrades don't necessarily have to be small, unless you're talking about the 4S. They tend to have major internal upgrades, a better camera, and a killer feature, like Touch ID, and in this case, Force Touch. And yes, they also tend to come with major iOS updates, like 5, 7, and now 9.