Last month AMD announced it joined the Intel-backed CXL (Compute Express Link) consortium and now NVIDIA is also backing CXL. CXL is a CPU-to-device interconnect standard for the datacenter space, it's based on PCI Express and it's quite a surprise to see all the big names in favor of the same thing for once.
For some time it seemed like NVIDIA would push its NVLink solution, but it appears the pressure to join CXL just became too great.
The spec will increase speed between a CPU and another device – namely GPUs, accelerators, and FPGAs – or memory pool, and intends to streamline the communication between each device for low-latency cooperation. The plan is to build around the electrical interface soon to be implemented with PCIe 5.0.