Not in tge Apple marketing speak, but for real. The S models are always what the non-S should have been in the first place - everything is optimized, perfected, polished. The 7 is effectively a "double S" model which won't have any new features, but will improve on everything to do with the 6S.
The only thing I'm not happy about is the form factor (the current generation is the worst ever), but I'm willing to bet that the 7 will beat the staying power of the current champ the 5S.
The only thing I'm not happy about is the form factor (the current generation is the worst ever), but I'm willing to bet that the 7 will beat the staying power of the current champ the 5S.