Hasn't Sonos been doing this for years with Trueplay? It makes a giant difference on my Playbar and Play:1's. Yes, I have to re-run it when I move the speakers...but that's basically never. When I do, it takes 2-3 minutes tops.
TruePlay is a simpler version of what the HomePod does - it’s basically EQ tuning based on room response. Sonos doesn’t have any speakers with a 360 degree array of drivers which can each emit sound not only with a different EQ but with a different time delay.
Why do you think there’s an A8 processor in the HomePod, which is ridiculously overpowered for a speaker that only has to worry about BT or WiFi? It’s for the real time acoustic modeling.