Or something close to it.
I was intrigued by news that Samsung has applied for a patent to, more or less, transform a cellphone into a piano. According to reports:
"Samsung's idea is to use a small video projector, embedded in the phone, to project an image of a keyboard or drum skins onto a plain, flat surface." Link. You find the relevant bit about mid-page.
And a very different kind of piano phone is found here.