2066 socket on x299 chipset is going mainstream this fall. There will be an updated X299 chipset but both will support new Cascade Lake X CPU for 2066 socket. Don't ask me where I got this info. Updated x299 chipset will bring better support for USB, M.2, Wifi 6 among other tweaks and such. No PCIe 4.0 but that's not a big deal. PCIe 5 is coming sometimes next year. New CPU will yield better clock speed than Skylake-X so you will see 18/36 part running at same clock speed as 3950x with a bit more agressive Turbo Overclocking. Good news the current 2066 socket motherboard owners will be able to use this new CPU with the BIOS Update which will be released sometime in September. Intel is going to offer extra 2 cores for about same price. New CPU will bring ~3% IPC improvement and tweaked memory controller supporting @DDR4 3000 Here is the pricing for this fall... $999 - Cascade Lake X 20/40 $799 - Cascade Lake X 18/36 $699 - Cascade Lake X 16/32 $599 - Cascade Lake X 14/28 $499 - Cascade Lake X 12/24 $399 - Cascade Lake X 10/20 $299 - Cascade Lake X 8/16 $199 - Cascade Lake X 6/12 LGA 1151 is basically going away. A new 10gen 10nm processor scheduled for Laptops and Notebooks will go ahead as planned and then next year Cascade Lake X will be replaced by 10nm counterpart. New Workstation line is on socket 3467 which we saw with Mac Pro. I'd say wait cause AMD is about to face a major kick back from Intel this fall. AMD cannot release no more than 16/32 setup on AM4 because of the nature of their design. So Intel is going to offer 20/40 for $999 or better say 2 extra cores for the price of 3950x. By the time 3950x is out in the stores we will see new CPU and new pricing for 2066 socket.