Page Visibility, Geolocation, and DeviceOrientation

Hi, there are some concerns around battery drain for both the Geolocation
and DeviceOrientation apis. The problem is that having a browser tab
running in the background and using power hungry hardware like gps drains
the battery of mobile devices too quickly.

The Vibration api does something interesting around Page Visibility, though
not necessarily for power usage concerns. The idea is to throttle or
disable an api when the page is not visible.

Could the concept of Page Visibility be worked into the Geolocation and
DeviceOrientation specs?

Regards,

Michael van Ouwerkerk