Re: In the past...
Put it in a laptop!
OK, so the water-cooling might be a problem. And 16A is a lot for a laptop power supply to put out, even if it's only at 1V. But I wouldn't mind having a scaled-down version. Hell, 4 physical cores would easily handle simultaneous building, testing, and interactive use (editing and the like).
I don't think there's been a non-Apple PPC-based laptop since the Thinkpad 860 in 1996.