Interesting article on the current status of Intel 3D Xpoint.
Memory enthusiasts disagree about whether a true universal memory is even physically possible. It is perhaps most useful as a goal to guide the computer industry forward. “The concept of the universal memory is attractive because the idea is to simplify,” says Wei Lu, a computer scientist at the University of Michigan and chief scientist at Crossbar, a resistive RAM startup company. “We have a big-data problem, and today’s computers are fundamentally not good at this.”
A single memory/DRAM architecture offers potential performance gains. While ten times slower than RAM, its 1000 times faster than SSD and avoids the performance penalty of memory swapping if there was a single memory architecture. This could impact the middle of the market like laptops and smartphones where DRAM and Flash could be merged into a single chip.
Has Intel Invented a Universal Memory Tech? – IEEE Spectrum : http://spectrum.ieee.org/semiconductors/memory/has-intel-invented-a-universal-memory-tech