OTA ATSC 3.0 really better than ATSC 1.0 ? how so?

For anyone who can record and playback over the air ATSC 3.0 ... is it really any better than 1.0 quality?

I have an HDHomerun Connect Quatro and record OTA ATSC 1.0 and playback using either an Apple 4k TV or an Nvidia Shield Pro and both clients look great (actually if the Shield is 100% perfect, the Apple 4K TV is slightly less in quality to my eye, more like 97% perfect).

In both cases above I am viewing the ATSC 1.0 recording on the same 4k TV, just sometimes alternating between Apple and Android clients.

I can't imagine anything looking better than what I have now with OTA ATSC 1.0 and the Shield client so I am wondering:

  1. is the quality of the picture for ATSC 3.0 really better, if so, how so?
  2. what is the size of a recorded file for ATSC 3.0 versus 1.0? twice as big? or?
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I would also be interesting to hear the answer to this question. I am guessing the bigger difference will be with the size of the file.

Unfortunately, this is going to be massively, locally, variable.

In theory you should be able to get smaller recording file size, based on the more efficient codecs ATSC3 offers.

Everything else is up in the air, even moreso than the above.

  • 1080p should replace 1080i as there is no reason for it to exist today.

  • 4K is feasible, but there isn't a programming supply for network TV available, with the lone exception of very limited FOX programming

  • Efficient channel sharing and better repeating availability could expand available coverage areas

Honestly, the thing I'm hoping for most is better coverage and fixing the sins of subchannels, but I'm not betting on anything being better, at this point. Every passing day makes 4K more of a pipedream, but let's see.

Main thing I'm interested in is more robust over-the-air transmission. Main thing I'm worried about is data privacy and paywalls. My market's likely to be one of the last to see a rollout though.

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HDR and slightly better picture quality due to better compression. Those are the only 2 pluses that I really care about. Sure, 4k would be nice, but just like with Ultra HD Blu-ray the big difference is the addition of HDR. Of course that requires that shows be mastered that way, and who knows if that will happen. The CBS affiliate here isn't even going to broadcast an ATSC 3.0 signal.

In Kansas City here. Some ATSC 3.0 channels come in with stronger signal quality. (no pixelating like atsc1.0) Also, 1080p at 60fps on some channels. Better video compression (HEVC) ATSC 1.0 is still on antique MPEG2.