I believe that a low-power-use auxiliary processor would be EXTREMELY
valuable.  There are LOTS of things that could run on a slower lower-powered
processor, greatly extending battery life.  At any time the high-speed
high-power-use main processor can be fired up to handle the real heavy
lifting.  Moving the monitoring functions off the main CPU would be a GREAT

>  - Add a small lowpower MPU like TI MPS430 to manage everything
> seamlessly when main CPU is down.  Stuff like motion sensors, wake
> sources, battery management, maybe touchscreen, leds so there is an
> always-on "guiding hand" in the phone that is consistent and reliable
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