I saw a video the other day that really stood out from the rest of the links making the rounds.
It depicts a man demonstrating software that appears to parse what he's saying fast enough to reassemble the same words by pulling and reordering bits from a recorded Michael Jackson interview. The result: Jackson appears to speak the same sentence right back to him.
The man goes on to explain how the software behind this process works, and his video closes with a live performance of the software in which a performer appears to employ the beat-box method to control the playback of audio and video on a large video screen behind him, in front of what I can only imagine must be a dazzled crowd.
If you haven't seen it yet, you can watch the video here.