This is really cool! Guitar was my first instrument, then I went on to learn bass, drums, and a bunch of others, but I never bothered to learn how to read music - or, really, sight read. The few songs I know on piano, I learned from an electronic piano that had a display with an image of the keyboard and the keys would change color to tell you which one to play. When I play Maple Leaf Rag for other musicians they're often surprised to find out I can't read music.
So I can definitely see a market for this and will probably try learning another song on piano with it. That said, I do wish I had just learned to read music up front, as I learned my first instrument. I think it would have opened up doors for me, particularly for playing with other musicians (like an orchestra or a jazz band). But who knows how much longer that will be the case - tomorrow's great musicians may learn on an app like this!
I learned a soprano instrument and was able to sight read the treble clef since forever. But try as I could I never could teach myself to be fluent with the bass clef. It just messes with my brain somehow.
So I can definitely see a market for this and will probably try learning another song on piano with it. That said, I do wish I had just learned to read music up front, as I learned my first instrument. I think it would have opened up doors for me, particularly for playing with other musicians (like an orchestra or a jazz band). But who knows how much longer that will be the case - tomorrow's great musicians may learn on an app like this!