I am siding with the minority here.
The reason why I got the Gear S is that I am sick of carrying my phone when I go trail running. I need the phone for safety reasons, but also need a way to track my runs, and an MP3 player. There are no higher end phones at a small enough size on the market, other than maybe yesteryear's iPhone S5, so it was either that or the Gear S.
It will however be hard not to have a camera (I run past breathtakingly beautiful places), and last night was the first time in years that I looked for compact digital cameras on Amazon: sadly, nothing much has changed in the past years, they a still very large
I hope the next iteration of the Gear S will have a
good built in camera. Or a camera accessory, as the OP said.
For the time being, I may take my iPod Touch on runs, so I have at least some camera and the Audible/Overdrive apps. Wish they had Tizen versions of them.