I might upgrade IF:
- the protruding camera lens is gone
- the ugly antenna bands get thinner
- the bend ability gets fixed
- The A9 SoC gets 2GB RAM
or I break my iPhone 5s accidentally
BUT(!) it fell down 6 stories already, and is yet still working without any crack in the display.
The 2GB wasn't in the SOC, there was no bendability, never was (ask the 200M+ people who now own those phones...), only way it doesn't protrude is if they make the phone thicker (for the same sensor size and resolution), or they decrease resolution (unlikely).