I've had this idea in my head but I doubt I'll ever use it for anything, so I wanted to write it down.
When I pause a TV show, on TiVo or Netflix I assume the play head will stop exactly where I left it. When I hit play it starts from precisely that point. This is great for when I pause to use the restroom or grab a glass of water.
However, when I pause and to go to sleep or to take care of dinner, I wish the play-head would slowly creep backwards until finally stopping at a good 20 seconds before where I originally stopped the play-head.
I often find myself hitting the 30-second rewind button on my TiVo controller whenever I come back to something I've been watching. It'd be nice if that could be programmed into what I'm using.
This idea though isn't about play-heads, it's about cutting out those small interactions we inevitably find ourselves participating in when we don't need to. My iPhone knows that if I just locked my device and decided to restart it within a few seconds it won't ask me for my passcode again. The same happens with the OS X screen saver password.
In both cases time affects precision or control of a variable which in turn, I think, provides a comfortable interaction. I like that.