This software update includes:
Improved 4K support for TVs and AVRs
Dolby Audio improvements for Dolby Atmos and Dolby Digital Plus passthrough content
Android recovery screen improvements and fixes
Reduced the occurrence of users seeing the Android recovery screen (corrupt data)
Improved instructions when the Android recovery screen is shown
Security update: security patch level increased to December 5, 2020
General security, stability and performance improvements
Not listed, but there are also some BT related fixes. I noticed that when BT headphones are automatically connected, the audio is now correctly sent to them. Previously the sound was coming through the TV speakers.
No mention of the firmware update for the remote. I wonder what it brought or fixed.
A+ Google!
I'm not particularly interested in any of those updates / none of those issues impact me. But I really like seeing change logs.