I personally hope they stay well away from fitness stuff. I think all those big companies having a go at it for years has sufficiently proved that a wrist device can not be accurate enough at tracking steps, sleep or even heart rate. While GPS is better served by a phone which has a more accurate chip and also the battery to sustain it.

And orienting towards fitness means compromises for size, weight, comfort and battery life. The original Pebble was slim, light, didn't have a sensor bump, wrapped nicely around the wrist.