Interesting idea. As a subscription app (like Spotify) the membership or subscription model would be shifted in several ways resulting in a presumably very large aggregated audience. I assume there would be significant value to the data these "members" would agree to provide?
So, would the numbers work to benefit a single museum enough to get them to sign on? Would it be worthwhile for a cultural consumer to download the app and maintain it for, say $4.99 a month?
I wish I knew the answers to these questions too, but it would take more market research than I am able to do. Perhaps I should hire TDC?
The value in musicians putting their music on Spotify is purely exposure. So many people use it around the world that it would be silly to pass up that opportunity.
However, it pays next to nothing, so in order to use the Streaming Service model, you'd need to find a more equitable way of splitting the proceeds to cultural actors involved. Museums need exposure, but since the app would be localized, I don't imagine the publicity benefits being too substantial.