Power consumption calculation and tray graph

[Metadorius]

Description of the feature, modification, idea or suggestion

Implement a tray graph showing how much watts of power does the device consume currently. When opened it should show power consumption per app (if possible). This feature would be very handy for handhelds and other mobile devices.

Currently I use Motion Assistant to assess my power usage, but it doesn't show the detailed info and requires having another application running to monitor. System Informer's tray graphs on the other hand are very handy and allow to see stuff at a glance.

Proposed implementation details (optional)

I don't have much idea about the exact way to implement but I have some sources to show it's possible to do somehow.
Motion Assistant shows package power/TDP:

Windows estimates power usage somehow (may not be precise):