The next iPhone will only have minor improvements (AAPL)

More evidence is suggesting that the iPhone that will come out this fall will be a slight upgrade from the current iPhone 6S and 6S Plus.
Basically, it sounds like Apple is preparing another "S" model for release later this year, with a body that will be very similar to the iPhone hardware currently on sale. 
 According to Nikkei, the big changes to this year's iPhone will be:
A better camera
Water resistance
Larger battery
No headphone jack
A "high-end version" with photo "correc