this synced-up version is impressive as well. unfortunately, it seems to be confirmed that the upper right video was a live stream and the streamer did not survive the blast :(
This is where I see Periscope going. Imagine a web app with that type of view for a breaking news event. An algorithm picks the best or most diverse streams and shows them synced side by side.
https://www.youtube.com/watch?v=6v5RQ2cDfiU