Eric Migicovsky the founder of Pebble is back with 2 new watches planned for this year. We plan to integrate those watches as soon as my own batch of pre-ordered devices will arrive. You can get your Pebble here.
The battery life promise seem really amazing with promised up to 30 days without charging. We hope we could implement HRV on the Time model but no details on that yet. Also it is not clear if SPO2 would be part of the premium model.
Still both models should provide activity based sleep tracking with unbeatable battery life.
Not sure if the Pebble Android app gets resurrected as well or if they will use some of the current alternatives like Gadget bridge or similar. Hopefully we will get a full featured companion app.