I just had this notification come up, not sure if it's exclusive to ~~Pixel Watches~~ (appears to be Pixel Watch exclusive currently) and Pixel phones - but seems to be a more "intelligent" version of Trusted Devices since supposedly the range is shorter, and it requires your watch to be unlocked.
Seems nice. If your phone is unlocked by the watch, a screen on the watch will appear for a few seconds that lets you relock the phone (and I suspect prevents it from unlocking again until the PIN is entered).
Obligatory "trust your surroundings" disclaimer if you enable this. I haven't had the opportunity to test the range yet, but I'll certainly enjoy it at home at the very least.
Google has a support document on this feature here - provided by @[email protected]
Don't do it it's shit in it's current form . Turned it on and at first face unlock would kick in faster . then bizzarly it would activate simultaneously with either finger print or face and results in a loop where it would unlock then get kicked back to the lock screen and tell me that it was unlocked by the watch but it wasn't unlocked . Got annoying enough that I had to hold the watch hand out away from the phone when I tried to unlock, eventually just said screw it and turned it off.
Pixel watch 2 and 8 pro.
Only had it work properly maybe a handful of times