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Persistent memory (MRAM, FERAM, and ReRAM) to replace DRAM, but it could take a decade
(www.theregister.com)
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Rules:
MRAM, FeRAM, and ReRAM all have a limited number of write cycles. It's certainly possible that the write endurance will be high enough that it doesn't matter by the time it can replace DRAM in a computer though.