A similar project
As soon as I read this, I thought of a research project I did in college not even a year ago. The project was to take an array of microphones and position them in some way so that when a person moved around, the microphones would change their "beam" to continuously point to that source. The source would have a small device that was tracked by a receiver on the other end. The computer would then change the weighting of what direction each microphone would listen to, thus creating a "beam" or area where the sounds could be picked up the most, and all other areas outside of that beam would be cancelled out, to get rid of the background noise.
Electrical engineers are trying to test similar devices in cars, where instead of using a cell phone, you have microphones positioned around the main driver in the car such that they can speak when they need to and all the background noise of the car driving down the road, the radio, etc, could be cancelled out. Everything could be completely hands-free, command-activated. I actually know someone right now working on this very application, although no word as to which automotive manufacturer is funding this research.
The real question is if this is something that Apple is trying to accomplish, what would they be doing with it? They mentioned 2 or more microphones... could this be an array that could be used in a similar fashion? I don't understand what would be the use of a rotating display, other than if you think of it like an enclosed workstation, where if you need to move your head to another location, the display moves with you so that it is in front of you. Of course, I don't see how that could be a consumer application.
Or perhaps the microphones in the display know whether you are talking to it and need to add something, or talking away from the computer, and not add the things you are saying because you are saying something else. Either way, I'm glad to see that Apple is continuing to innovate. I wish I could work there and see all the cool ideas they are putting together...