Ultra M.2 interface

Recently I been seeing the latest interface M.2 go yet again to another level, with speeds up to 32Gbs! Im wondering how they do it, and if you really could take advantage of such data transfers which looks pretty promising on paper..
 
The secret is that they use the processor’s leftover PCIe 3.0 lanes to feed it, so it runs as PCIe 3.0 x4 (32Gb/s) which is over three times faster than the others PCIe 2.0 x2 M.2 (10Gb/s) and five times faster than mSATA (6Gb/s). You can find it on the AR Z97 Extreme6 model.. is there any others?
 
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