The Nikon KeyMission 80 is an odd camera -- though that's not necessarily to say that it's a bad camera. Shaped more like an old voice recorder, the KeyMission 80 uses two cameras, a front and rear facing option much like a smartphone, of course leaving the rear one for selfies, since the tech specs aren't as great.
While categorized as an action camera, the KeyMission 80 is really more of a lifelogging camera. It's designed to be work to capture moments from your day quickly and easily. It uses a fixed focus like other action cameras, but doesn't have the same wide angle lens for capturing the entire scene -- the f/2 lens captures an 80 degree view, hence the 80 in the name. The camera doesn't capture 4K, but the front-facing camera uses the same size 1/2.3" sensor as the KeyMission 170.
The 80 has a lower quality than the 170 without the 4K, but it does feature optical image stabilization instead of electronic, likely due to the fact that the body is larger.
The 80 is designed to be easy to use as well as quick. It includes photo and video modes, as well as a panorama option and of course selfies with the rear camera.
While the body is rather odd, it is still waterproof without a casing, though with a 3.3 foot depth rating the extra protection is more for accidental drops in the toilet than scuba diving. The camera is also shockproof to five feet. A clip included with the camera is designed to help keep the camera readily accessible, easily clipping to a backpack so it's always ready to go.
While the 80 is unusual, that doesn't mean it's not a good option either. The camera is designed for quick access to easily shoot everyday moments. Essentially, the KeyMission 80 is a waterproof smartphone camera (though we can't gage the quality without a full review) -- it has dual lenses and is designed to always be ready, but it can handle a drop in the sand or sink. The camera is expected out at the end of October 2016 and will retail for $279.95.