So a couple of things...
Firstly, and least important, the camera is called the RX0, not RXO. I've updated the title to reflect that.
Secondly, this is not an action camera, despite what most people assume at first glance. The only thing this has in common with action cameras is the form factor. The lens is 24mm equivalent, which is completely useless for FPV action camera shots (action cameras are typically 12-16mm). There's is no internal 4k, the max video length is 5 minutes, and it doesn't have crazy mounting options.
So what is it then? It's a B-roll camera; it's for multi-cam setups; it's for VR recording; it's for when small size is critical and you need the best image quality possible.
In short, it's an RX100 packed into a minuscule body with a bunch of compromises. Absolutely amazing camera (on paper, at least), but intended for a very limited market.