Looking back I see it has been six years since I did this. Time marches on...
So, it's a Sony DN-1080. It doesn't look much different to the previous, just improved software really. It is set up for 4k and has Dolby Atmos and is thus a match for the TV and disk player. Let's test!
Atmos is good if the sound engineers take the trouble to set it up. If they just pick a few sound effects and put them behind the listener but otherwise use the old surround positions, not so good. There are Demos on YouTube that show what should be happening.
It comes with the two current surround systems, Dolby Surround and Neural:X. In different ways these do the same thing, spreading the sound out to all the available speakers. In my case that is 5.1.2, with the 2 being front height. The A/V uses a sound test to work out where these are.
As with Atmos, results are variable. A lot of prestigeTV programmes and movies are broadcast in 5.1 these days.