Nah. First of all, it's not the same performance at all (in terms of IOPS and latency), and even if it were another big draw of M.2 for me is the fact that it takes up basically 0 space and no cables.Just raid 0 SSD. Same performance and cheaper.
I'll just wait a year or so and see what the market looks like then. When I get that SSD I want to install Windows 9 on it anyway.