Normally iPhone worth an update only in two years time. I doubt next one will be so revolutionary it makes the 7/7Plus obsolete. Probably it'll bring a new design with same hardware, or just slightly better hardware. That's what I believe. And, being like that, I'll better wait for the 8S series.
Cheers,
The 6S was worth the upgrade for a number of reasons. The camera was improved, somewhat. The 2GB RAM has a huge impact on day to day usability (lots of Safari freezes with 1GB devices like the 6 Plus). 3D Touch was overhyped and oversold, but it *is* a thing. TouchID is faster, more accurate/reliable on the 6S. It was a viable upgrade to the 6 devices. It was actually one of the biggest upgrades from a previous iPhone model, ever. Even bigger than the iPhone 6/6+ from the 5S, IMO.
However, the 7 is just... lackluster in that regard.
Apple's software innovation pace is quite molasses these days, and the hardware hasn't changed drastically since the 6/6+ were released.
Couple that with the current supply issues (they aren't selling that well, this has to be them simply being too conservative with production) pushing the date you can even get the phone back into December...
Yea, total pass for me.
Honestly, the iPhone 7 is one of the smallest upgrades that Apple has put out, ever. Way smaller than the 6 to 6S, the 5S to the 6, and even the 5 to 5S. It is a smaller upgrade than the average 's' cycle, IMO.