In principle, I have no problem with that. Transparency is good, and it can lead to better business behavior without more ham-fisted regulations that simply force businesses to do what the government wants. It's the "nutrition facts label" strategy.

But I really think a better solution is just allowing more app stores or third party app installation. Let people choose who they want curating their content. Apple can still enforce their own store policies like they want, and if enough consumers revolt, they have somewhere else to go.