It's also missed when watching a show that you DVR'ed, after the fact -- like the series finale to Lost, or the Super Bowl.
If/when live broadcasts are completely a thing of the past, I think this sense of engagement will be lost forever, and people won't even realize what they're missing out on.
In a way, it's sort of like watching someone play a video game live on Twitch vs. watching it on Youtube.
Does anyone else know and also feel this sense I'm talking about?