This review says it will decode atmos and dts-x. Yes, bluerays will output in your selected format unless you use "passthrough". I would recommend atmos or dts-x for gaming if you like how that works in your room. If you have high ceilings the soundbar might not do height virtualization very well. Try them all and see what works best for your room.
To get atmos and dts-x you will need to download the apps in the microsoft store. To use with your soundbar you may need to buy a license. I have both apps, very worth it.