I hope that if this feature requires permission from the user. Otherwise it allows one more variable for fingerprinting the browser.
This simply isn't true. That's not even the only recent API that Chrome has spearheaded that is being abused by ad networks and other nefarious actors.
That seems to be fixed, at least on firefox. The result from console.log(new AudioContext()) seems to be generic values that don't correspond to the actual values (eg. it reports the sample rate as 44.1khz, but my system sample rate is 48khz).
Chrome is the worst browser for privacy by far. Between cookie policies, X-Client-Data backdoors for DoubleClick and APIs like this one it seems awfully convenient that this stuff continues to make it to production for ad networks to abuse with impunity.
I have a WQHD (3440x1440) main display with two old 1680x1050 panels mounted side by side above it. Even amongst those with three monitors my setup is quite unusual and thus would be incredibly useful as a fingerprint.
I see that it'll be gated behind a permission popup like many other modern browser features, but based on the number of clients I've had to clear ad networks out of their "Allow Notifications" lists for it's quite clear that a lot of people just hit "yes" to whatever they're prompted about.
I of course see the value to developers of complex web apps, but IMO this is the sort of thing that shouldn't actually happen in the browser itself. Make it exclusive to Electron or similar platforms that use a web browser style engine but can have additional capabilities beyond what's reasonable to expose to a plain old browser.