ATSC 3.0 (And 1.0) reciever: https://www.geniatech.com/product/a683/

To the best of my knowledge, the stuff below is correct.

ATSC 1.0 is the current TV broadcasting standard in the U.S, with select areas having ATSC 3.0. (ATSC 2.0 got skipped.)

There isn't much to be gained at all in using ATSC 3.0 currently if one can get a good signal with ATSC 1.0, but in certain scenarios, it might help with reception.

Later, when less spectrum is taken up by ATSC 1.0 broadcasts, it will allow for broadcasting 4k resolution video and more stations.

It will also allow for paid, over-the-air channels using DRM technology. (Hopefully this won't be a problem, and at least some subchannels are required to be free by law.)

I have not ordered one, but I'm thinking about getting one when there are more stations in my area broadcasting with ATSC 3.0. It doesn't look like the rollout is going very quickly, but I expect it will be useful in the next six years or so, and there are already some stations broadcasting using ATSC 3.0 in major cities like mine.