Stan Schroeder over at Mashable write on his idea: Location-Aware Disposable Apps For The iPhone. The iPhone part is just obligatory hype since any mobile with location sensing could support the concept.

So, what is the concept? It's not really disposable, but location-activated installation for apps. One example: when you are near the train station an app would "pop up" for installation with train times. Or, when you walk by restaurants, you'd see pop up installs for menus or reviews.

The comments tend toward, "don't pop up things I don't want" and are worth reading. The real answer in my mind is a broker for such services. The end user would select what sorts of apps they might find interesting and have the broker only pop those up. The categories might be: business, food, transportation, entertainment, etc. The other half of the story is the "disposable" part. Would it be possible for the app to "uninstall" automatically when the user "leaves" the area of interest? That'd be ideal for those who forget to dump unused apps.