They have one that is two PCIe3 x16 connections from one ASIC right now, it uses a ribbon cable :). That's janky, but it does work on currently available platforms. I've heard Mellanox will do a CAPI NIC, which is quite tantalizing.
Thanks, I didn't see that. But yes, that's weird. In regards to pcie4,I believe the power9 will be the first to have it, but I haven't seen a solid release date for that. Naples didn't look like it had it -- just more pcie3 lanes.