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Bob, you're correct in that the power improvements will likely come from the processor/network/disk/etc. side of things, rather than the battery. For example, look at overclocking a processor. It requires more power, depending on how far you overclock it. So, if you underclock a processor, it requires less power. Although you won't get as fast a speed from it, the battery life on a device will become less. So once mobile processors hit a certain point, it would be more advantageous to have a longer battery life, as opposed to more power.
Or maybe they'll just develop a good system for mobile devices that can change the clockspeed of a processor "on the fly", for power saving.
(And wow, six hours after MR had this, it became news on Slashdot. We beat Slashdot on something that's a frontpage story there!)
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