We've had TiVo-like rewind functionality in our house for a year or so. If you miss something, you hit Rewind, becase the set-top cable box is constantly recording.
This has spoiled me horribly. Now I find that when I'm listening to radio in car or office, I want to be able to hit Rewind and listen again.
When I was in Las Vegas a few weeks ago during March Madness, I wanted the TV in my hotel room to rewind so I could see a play I wasn't paying attention to. Of course, the Sahara hotel had TV technology not much advanced since the Rat Pack. (OK, OK, I exaggerate.)
In the Hard Rock Cafe in Vegas, while watching NCAA hoops, I mentioned this impulse to some young guys also watching the game, and they said they'd also had the same feeling.
It's got to be only a matter of time before every device that streams content also caches it for replay. I expect even the lowliest devices -- your cell phone, the clock radio in your hotel room, whatever -- will have a Rewind button.
Do you also feel the need?