[ecspike]

It's not that the Mickey Mouse shirt isn't, it's just that companies don't go after it (at least on the small scale in public spaces).

Both are fair use. I think it might be lobby stuff and how they are consumed. Great music can transform / enhance a pivotal moment in a movie whereas the presence of an Apple logo or Mickey Mouse shirt, not so much.

Companies can and have sued for licensing fees or if they feel their product logo was shown and misrepresented in film.

Back to the t-shirt example, on the movie/funded production scale, a lot of this is prevented by the wardrobe department making sure extras are not clothed in licensed stuff.