If you're talking about the DeviceOrientation event [1], it's been shipping in browsers since 2010 [2,3].

It also works on your MacBook. [4]

[1] https://w3c.github.io/deviceorientation/

[2] https://caniuse.com/#feat=deviceorientation

[3] https://www.engadget.com/2010/07/06/google-chrome-gets-some-...

[4] https://simpl.info/deviceorientation/

(PS my humble opinion is "yes we should". I like being able to develop a heart rate monitor PWA for my phone, and I don't see what's different from granting some random native app the same access. At least with the web I can read the underlying code.)