knowom :
If they are smart they are ditching it in favor doing a similar approach with FPGA's instead which are way more multipurpose and can be re-purposed which is great.
Intergrating FPGAs has different target - tighter intergration. Btw, they have very old FPGAs intergrated, it's more of a proof of concept so far, while KNL is real product.
My problem is that you can stick only so many KNLs in motherboard (I'm not convinced they support 4 sockets), so in 7U space you could fit probably 28 chips given 4S support. In PCIe mode, I've personally built a system that contains 18x 7120 (watercooled) cards in 2U chassis on PCIe backplane. Host system supported three of those backplanes, allowing total 54 Xeon Phis in 7U space.
Situation looks little better if you use narrow sleds, but they are pricey. PCIe is just so much more universal.
Of course socketed, Omnipath or not, is brilliant idea, but forcibly moving solution to another form factor 'just because'? Not very fun, oh no.