why would it be useful? it would be very helpful for mobile games that are made with construct. it would help with the following things such as;
- preserving more battery life on a mobile device
- longer play sessions
- take longer for phones to heat up (construct mobile games tend to make phones overheat very quickly)
- help in lowering the overall cpu usage on less powerful devices.
- since more mobile devices have even higher resolutions, it would help with letting games that don't need to update as often.
Unfortunately this is not currently possible with the web APIs available today. Browsers would need to add new features before we could implement this.
Star this related Chromium issue to show your support for Google to develop it: crbug.com/485600