https://en.wikipedia.org/wiki/Dolby_Atmostl;dr
New surround tech with added height channels. Great. I can imagine there could be uses. Like any new tech before you've analysed it, could be good, could be trash.
Additional surround height channels cannot possibly be as good as 2 channels, properly recorded and mixed to drive stereo headphones for generating 3D sound. This is key. You can't beat headphones for 3D sound. If you can't understand why then the conclusions which follow will seem even more incomprehensible, grandparents involvement or no.
Best way to meet that impasse head on is to go get your headphones and find some older 3D audio and listen to its quality. Or make some, like I did in the 1980s. It's really great stuff, good fun and can be used creatively and with elegance. I don't doubt for a second Eno could do something worthwhile with it. And could have in the 1980s on the 2 tracks of an LP while instructing the listener to use headphones had he so chosen.
Adding height channels to surround cannot make better 3d audio than you could achieve with headphones.
So I'm putting Eno down because this is a marketing claim that is garbage. He could have done top notch, first rate, headphone 3D sound on his albums at any time in the past, did he even try? Has he said? He's releasing stuff using $some_new_tech (atmos) for which you need to buy a bunch of kit and justifying it claiming 3D is wonderful. And it is! And he never needed that new tech to take advantage of it and could very, very easily, right now, get whatever he has done with this atmos remaster and use it to release a "3D mix for headphones" that means anyone could hear it without buying new kit.
So yeah, seeing that made me pretty suspicious of atmos and annoyed with Eno but hey, I didn't know atmos beyond the incontrovertible fundamentals of what it clearly can't do because nothing can, laws of physics etc. Someone else on the thread posted Benn Jordan on atmos, he's clearly done some work to understand what it is and its merit.
https://youtu.be/5Dw3aKbw5Wo
What's your guess on this, was Eno paid for this Atmos stuff by Dolby? Benn Jordan claims he got an offer and he's a little less famous and revered than Eno. This kind of "buy tech to listen to my stuff" is quite unlike Eno in the past. But people do change their minds without being paid to do it.