Embedded magnetic RAM has been around for a bit, usually thanks to the work of Everspin whom have licensed their technology to GLOBALFOUNDRIES, though today Samsung has announced they are developing their own.  It is less expensive to produce than STT-RAM, PC-RAM or memristors yet offers many of the same advantages over flash memory, namely much higher performance and lower electrical requirements.  

Samsung is a ways from production, according to The Register Samsung doesn't expect to tape out a 1Gb eMRAM test chip until later this year.  This would be a big leap forward for the performance of embedded systems, as ARM is working with Samsung to ensure compatibility and we may even see eMRAM onboard ARM chips once Samsung's production lines ramp up.  It will be interesting to see what effect this will have on the market once it arrives; hopefully a larger splash than a certain other type of non-volitile memory!

"Samsung this week claimed it is mass-producing and commercially shipping embedded magnetic RAM (eMRAM) to replace EEPROM, SRAM, and NAND memories in embedded electronics."

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