Well, I'm glad I asked the question then. I was confusing the two.
So the new signals are digital and have nothing to do with HD.
HD is a screen resolution only, not a broadcast medium.
The new digital signals are sort of like the HD-Radio I keep hearing about. "There are stations hidden between the stations you get now!" And I'm thinking, "Yeah, right."
So, if I got a converter for my OTA TV and watched OTA broadcasts, I'd get a whole bunch new channels because of the digital broadcasting? Like stuff between my traditional channel 4, 6, 10, 12?