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I think the idea is to use static RAM for the working memory of the CPU... I am guessing it would be slower than dynamic RAM, but it would save the state when the CPU is not powered, so when power returns, one wouldn't have to load the OS again. Sort of. The CPU itself has registers, and they would lose their contents without power. Apart from the expense of creating a CPU that would use static memory for its registers (design, fabrication, etc.) it would probably be too slow to be workable. But the contents of the registers might be saved out to a special static memory module on power-off.
I only know enough about this level of hardware to be dangerous, though. Someone else will probably be able to point out why this wouldn't work.
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