This is a pretty big deal, as it is probably the first step towards PCIe storage in a mainstream consumer device that we’ve seen. I’m still awaiting official confirmation as to whether or not this is an M.2 based solution or a proprietary connector. Update: It’s a custom Apple design, not M.2. Since there’s no PCIe routed off of the CPU in Haswell ULT, these 2 lanes come from the on-package PCH.

AnandTech2013 MacBook Air: PCIe SSD and Haswell ULT Inside

MacBook Air