Misfit's Vapor smartwatch is a sport-oriented device that features several sensors (including altimeter and a heart-rate sensor) and a built-in GPS. It is powered by a Snapdrapon Wear 2100 CPU and 4GB of RAM. The display is a round 1.39" AMOLED display with 326 PPI (which would make it around 450x450 - although I am not familiar with such a round AMOLED).
The Misfit Vapor will launch later in 2017 for $199.
1.4" round AMOLED