It allowed my family and me to look at the art while listening to information about it just like an audio guide would. This was the fastest implementation of something like this (two shortcuts on an iPhone Home Screen) I could think of, and you can even map the Action Button to it.

I could also see this being useful from an accessibility perspective, as it is great for people who only need text read out loud to them sometimes, while still being very easily accessible with a single button press.