Could be good or bad depending on how it all plays out.
Another party that seems to have been bamboozled into believing that one TV station could provide two-way broadband service (25Mbps down, 3Mbps up by FCC definition) to more than one customer at a time using some fraction of their 6MHz channel.
ATSC 3.0 offers about 28-36Mbps bandwidth all in per channel depending on parameters chosen. 25Mbps inbound and 3Mbps outbound leaves little or no room for an HD TV channel. I'm making an assumption that higher bandwidth will likely result in error rates that may be acceptable for TV but aren't for data.
The numbers don't add up even if they deploy ATSC 3.0 as a massive Single Frequency Network configuration with very tiny cells.
I think this is more about making universal broadband noises that Congress wants to hear without troubling themselves with the fundamental Physics behind it all. How do they plan to facilitate outbound data as part of this? TV channels reach so many people because they are "multicasting" but "broadband Internet" is about a dedicated personal service that you can do what you want when you want and that's not something you can do with only 28Mbps (times how ever many SFN cells you have) to spread amongst all your customers.
I submit that the broadcasters are saying one thing but have something entirely different in mind. I wonder if they've finally come to the realization that voluntary adoption was a pipe dream.