We have actually seen M.2 solid state drives for a while now, but up until recently none of them have hit retailers. This is probably because motherboards that support M.2 were only just launched with the advent of Intel's 9-series chipset. One of the first to hit retailers is the Samsung XP941. The first generation of M.2 is based on PCI-Express 2.0 x2 with a theoretical maximum bandwidth of 1000 MB/s read and write.
- CES 2018