ah yes...blade servers v2.It is basically a full modular PC concept where the CPU (and GPU/RAM etc) are on an expansion card and you slot them into a chassis. To upgrade you simply replace that whole board. Kind of the reverse of PCI-e , the system is the add in card and you connect it to a backplane for the rest.
View attachment 27529 (from Anandtech)
Neat enough idea but I am not sure how practical. Laptop version first please