Very cool. room correction actually has seen lots of improvement in the past decade luckily. A lot more AV receivers come with a mic and calibration process now. I'm not sure what the story for all the sonos/whatever stuff is like, but I imagine there's something. Thats not a cure-all, but its something.

15 years ago that was only for the nerdiest of the audiophile nerds, and its available to any moderately enthusiastic consumer now.