Yole Developpement says that emerging Non-Volatile Memories (NVM) will generate $53 million in sales in 2015, but the market will grow quickly to $4.6 billion 2021. That's a CAGR of 110%!

Next-gen memory, time to market (Yole, 2015)

The market is still limited to niche markets due to the limited densities, but this will change in the near future, and Yole says that the clear go-to market for emerging-NVM will be storage-class memory. High-capacity SCM applications will use either phase-change memory or RRAM memory, while applications that require high endurance and speed will adopt STT-MRAM memories.