I like this idea but extending it to the whole world based on geolocation. Use an app and earphones to find voice/text descriptions of places and landmarks, monuments, sculptures, buildings, etc. Everything can be geo-toured.

Of course in a museum is perfect but based on geolocation it doesn't have to be linear, you can go anywhere in the museum and get voice/text about that particular place/masterpiece and when they are changed then easily change the audio/text for the place.

Love it!