It looks like an extremely interesting standard, although I'm not sure what it would look like from a hardware implementation. Would the HMC be an on-package module that sits very close to the CPU, or would there be some form of socket/slot/connector/etc. for removable modules. I think we'll be seeing the first implementations end up in high-end servers, so they can work on the form factors there.
4770K @ 4.7 GHz; 32GB DDR3-2133; GTX-770; 512GB 840 Pro (2x); Fractal Define XL-R2; NZXT Kraken-X60
--Many thanks to the TR Forum for advice in getting it built.