Sorry about that, it didn't register that GP's question was tangential to GGP's UWB-focused links. Regarding IR, I agree that interference is the biggest issue

Sorry about that, it didn't register that GP's question was tangential to GGP's UWB-focused links. Regarding IR, I agree that interference is the biggest issue. The electronics also get harder as you approach THz frequencies, but that could be worked around if IR radiation weren't so pervasive. Interference is probably the reason you can only get up to 1Gbps or so, even in a lab (and you'd need 10.2Gbps to transmit HDMI 1.3, for instance).