I don't own an Apple TV--and have no idea if there's a cost for the app, though they say you can stream the music for free (I have a suspicion there's either an upfront cost, or perhaps some sort of in-app purchases will be coming). Not only does the app allow for streaming performances, but you can follow the score while the music is playing. The available repertoire at first is limited, but they indicate more is coming.
Below is some information from the press release:
For the first time, interact with a musical performance at home. Discover the stunning BeatMap and NoteFall, note-by-note visualisations that reveal the secrets of the performance. Follow the score as it scrolls. Or simply listen to beautiful, heart-lifting music.
Touchpress on TV will be available on the App Store at launch of Apple TV. Users will be able to stream five high-quality classical performances, for free, straight away with more music coming soon.
On first release users will have access to:
• Beethoven's Symphony No. 9 in D minor - Movement I, conducted by Leonard Bernstein
• Beethoven's Symphony No. 9 in D minor - Movement II, conducted by Fernec Fricsay
• Liszt's Sonata in B minor - performed by Stephen Hough
• Vivaldi’s The Four Seasons, Primavera - conducted by Trevor Pinnock
•Recomposed By Max Richter: Vivaldi, The Four Seasons - Spring
Touchpress will soon add Liszt’s Transcendental Etudes, 10 and 11 performed by Daniil Trifonov. Following that there will be regular content updates, bringing users the best classical music in the world.
Unlike traditional streaming services, Touchpress on TV brings groundbreaking musical
visualisations to the living room. Users can:
• Immerse themselves in the BeatMap and NoteFall, two stunning note-by-note visualisations
that help reveal the secrets of a musical performance.
• Follow the score as it scrolls in perfect synch with the music.
• Watch three classic video performances: watch Leonard Bernstein conduct the 1st movement of Beethoven’s 9th Symphony; experience the beauty of Stephen Hough’s rendition of Liszt Sonata in B Minor; and enjoy Max Richter perform his visionary Recomposed with Daniel Hope and L'arte del mondo.