TV vs DVD's. What does this figure mean?

Just a glitch, or something worth looking further into?

"The movie Finding Nemo is the biggest selling DVD of all time in Australia. Nevertheless, when Channel Seven showed it at 6.30 last night, 1.3 million people tuned in."

Ah mum, can't we see it again? | The Sydney Morning Herald Blogs

We understand that TV's not dead, and likely will never drop completely off the perch (despite the naysayers), but it makes for an interesting thought. Logic dictates that, even if you want to treat Sunday evening as the family get-together time, you'd put on the DVD to avoid the commercials. But perhaps we're overlooking something here. Perhaps people, for certain events, enjoy the scheduled nature of television because it's a reminder that they're taking part in a mass event, that they're not alone, sitting insulated in their living room, but rather belong to a community, even if that's a community of television watchers.

More thinking required.