
TV renders DVR obsolete.
You watch what you want when you want to. There's no ongoing stream to capture and time-shift a la DVR.
Part of Apple's business model is "it's OK to tell users technology X is obsolete and we're not supporting it anymore."
You want to watch something? you pay a buck and watch it. No need to schedule a recording. Want to watch it again? it's worth more then, innit? pay a buck and watch it again.
It's 2010. The VCR model is dead.
Only if all of your content is available somewhere, or you don't mind paying that much. Which it isn't, not for me, anyway. I just dropped my expensive TV, why would I want to start up, again? But it's ok, DVRs for the Mac also cost $99. If you think VCR = DVR, you're just blind.
Cost analysis:
I have 2 DVR tuners at the moment, cost $198, could have saved $10 at Amazon, but I had reason to buy everything at once. (I'm just ignoring tax for simplicity) I personally, not counting the other 4 members of the family or live sports, watch 7 shows in the fall lineup, IIRC. At $.99/episode (just assume they are all available for that price, which they aren't) and 22 episodes for the season, that is $152.46. That already paid for 1.5 of my DVRs which get these shows for "free" forever, and I haven't even added in my wife's shows, yet. She watches more than I do. Or the summer shows we watch, or reruns.
Even $.99 is way too much for TV. Give me a $10 season and I'll consider it.
Nah, that's still too much. DVR still renders

TV obsolete, or at least, stupid. I've said it before:
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It's just an expensive shortcut for those that can't be bothered to find a way to plug in the PC/Mac directly.