You guys do realize they are still releasing new CPUs right? They will have PCI 4.0 lanes on chip.
It's not really meant for GPUs tbh. It's more for Ethernet/fiber and storage. 16GT/s concurrently both ways(32GT/s total) is more along the speeds needed for Ethernet 40GB/s(not for home use, HPC/etc)and future NVMe devices planned for 30GBs speeds. This is the only standard interface in the world capable and economically(also backwards compatible) viable as a solution.