people are commenting that pcs are already modular but reading it I think its looking to throwback a bit further. Computers used to have a passive backplane design and you would put in a compute card with the processor and a memory card the way you do a graphics card or audio card. Much of that went away because they needed interconnects with larger throughput and isa was just to small. Given where pcie is at this point I can see going back. Its something I sorta wanted in the early aughts back when you had boards with isa, pci, and vesa slots. It was kinda a mess but we still had some old stuff and it was like. Wow that is so much more neat and tidy.