ATSC 3.0 isn't something that the FCC is actively contemplating. It is being promoted by some players in the industry (and dismissed by others) and that's about as far as it goes.
The more important issue is that if they don't implement something soon, the repack may prevent doing so in the future as there may not be enough bandwidth to run two incompatible systems.
The more important issue is that if they don't implement something soon, the repack may prevent doing so in the future as there may not be enough bandwidth to run two incompatible systems.