Can someone help with why everyone is all excited about OTA sub-channel EPG? Here in Cleveland the sub-channels are very limited. Our NBC and CBS affiliate have weather information (which is nice, but I don't need the EPG for that) and the MyTV affiliate has Tube (which, once again, is nice but doesn't need EPG). Oh, and the PBS affiliate in Youngstown has about four religious sub-channels.
Do other cities' stations have real content on the sub-channels?
Yes, you'll find other cities with SD streams mixed in with the HD streams of CW, MyTV, etc. For instance in my DMA, CW-SD is mixed in with Fox-HD, MyTV is mixed in with CBS-HD, and my PBS has 1 HD and 2 SD channels on it's carrier.