I hope not. I watch Fox News, but getting them in HD is not a priority to me. I think it would be much like A&E HD...75% SD.
Lets go for some stations that have things to gain in HD or already have a bunch of HD content:
INHD
Sci-Fi
Speedchannel
If the reason we don't have more in HD right now is bandwidth, then let's save the bandwidth for those things that get the most out of HD. Sure, I'd like everything in HD at some point, and I'm sure we'll get there later. For now, go for things that the sound or clarity really help with.