And to elaborate on the bike mount use, it's not just for "I want a clock on my handlebars." Paired with the GPS in your phone, you can use a Pebble as a bike computer, providing information like speed, distance, and elevation change.

The battery life and daylight visible / always on screen are requirements for this.

https://upload.wikimedia.org/wikipedia/commons/7/78/Pebble_w...