To alleviate signal loss at speeds beyond 64 GT/s, PCI-SIG is looking to implement optical connections for future PCIe revisions. The newly-formed Optical Workgroup will handle the implementation of the new interconnects across a wide range of optical technologies and form-factors.https://www.notebookcheck.net/PCI-SIG-creates-Optical-Workgroup-tasked-with-optical-interconnect-implementation-for-future-PCIe-versions.738477.0.html
Graphics cards with freakin' laser beams!