I feel this would have been incredible....in the 2014-2016 timeframe. There just isn't any room for this product anymore. Pebble was at the top of their game before Apple came in and showed them up.
There are other options like Garmin and Amazfit, but honestly the UI on both of those are pretty awful, especially compared to the slick Pebble UI.
I absolutely hated brushing the iWatch screen and triggering random crap and there was no other way to interact with it! Garmin's w/ 5 buttons and transflective (sunlight-readable) displays have been the closest alternative, and they have a pretty cool "touch-screen alt mode" which you can access via press+hold on two of the diagonal buttons to enable/disable (or automatically starts if you open up the "maps" app for dragging it around).
Long battery, sunlight readable, buttons.