FCC commissioner Jessica Rosenworcel blew right past 5G this week to focus on sixth-generation wireless broadband.

That came in a speech to the Mobile World Congress Americas in Los Angeles, where she also offered up her idea for the blockchain distributed computing system that has been generating plenty of buzz.

She envisioned 6G as featuring "terahertz-frequency networks and spatial multiplexing" with multiple simultaneous beams of data transfer, all requiring unprecedented network "densification," as in miniaturized base stations imbedded ubiquitously in the environment.