All indications I have read so far indicate the system will work at 30GHz and up. We have some bands up there but almost all use of those frequencies involve high gain unidirectional antennas and line of sight transmissions.
It could impact some that are trying to work on distance records by adding to the noise floor, but it should not impact 99% of amateur operations.
I know the electric utilities are always looking to add another income stream on their existing infrastructure but I really have my doubts that high speed data is really going to make the transition to wires designed to carry high voltage/ high current.
Bruce