Two of the areas that seem most promising to me, in terms of cultural impact, are the performance of electronic music and the real-time production of animation.
Nowadays, hybrid movies that merge live action with computer animation to produce three-dimensional digital maps of their real-life actors' body movements include lots of fine-grained information about expression.
Shazam incorporated it into its core technology, improving its accuracy, and added a layer of animation and visualization to create a fun and engaging way to see the lyrics in real-time with the song.