PiP is useful
> Seriously, who uses PiP anyway? Stupid marketing gimmicks
> aside, how is it at all practical for to watch something in the
> corner of the screen with no audio.
I frequently use PiP to play a video game fullscreen, while listening to news (talking head shows) in a small window.
PiP should come with AiA -- audio in audio. On a modern 7.1 type audio setup, you could place the different shows in different spatial locations; I'm pretty sure the brain can process that better than straight mixed audio. Watching 3 shows with spacially separated audio would be like standing between 3 conversations at a party: you pay attention to one, miss most of the other 2, but if someone says something of interest to you, you tend to notice.
AiA could degrade reasonably smoothly on an old stereo setup (can still do some spatial placement with phase alone); and straight mixing on mono would be useful in some cases. Hell, I often wish I could mix two stations on my car stereo -- one talk show + one music show.
I should patent all these ideas instead of giving them away like this. Sheeze. If you design and market something based on these ideas, please at least give me one....