I've got a tap into a basic cable feed at my shop hooked up to a small HD TV with a built in QAM tuner. We get about 10-14 HD channels. ABC, CBS, NBC, FOX, VS, WOSU (3 of them), Weather Plus and maybe a few more. Also movie channel previews.
Can't remember the exact channel for each feed though. That info is written on a piece of tape by the TV but I'm not there.
We just do the auto-tune thing on the TV and go with that. We'll do that a couple times a month to see if anything new pops up.
And the over the air feeds aren't going away. Just the analog portion is going away. Digital over the air will still exist. You just need a TV with the appropriate built in tuner to make use of said signal.