I wonder if there is any progress in estimating audio source position by simultaneous recording from several points (3+ I believe).
Thinking a bit of this funny feature, I thought it might be quite useful. For example, to remove background noise before speech recognition. Or to record a conference and split audio by the person speaking. I think there can be some fields where it may really work. However I never heard about something of this kind that really works.
If I were not wrong in my calculations, even recording at 44100 Hz may be quite sufficient (in theory, of course) to perform analysis.