DDR5 is 50GB/s, which is workable. But it's possible there'll be a way to apply this technology to get even better throughput on memory and processors as well.

EDIT: Here's a thought. Mosix, the software that allowed pooling processors from multiple separate computers together over a network always had the issue that the network was too slow to properly copy memory around fast enough. With this kind of transfer speed it's actually practical to stream memory from one machine for processing on another.