Will indie developers continue to publish apps in the AppStore or will marketing agencies and larger developers push them out as they discover the power of mobile?
I think it's comparable to YouTube. Remember lonelygirl15? For a month or so, that channel dominated the platform as "vloggers" found their bearings in a new medium. The most seen video was an acoustic guitar performance by a relatively unknown artist. Then the music industry jumped in, and now we have Bieber and Co dominating and sucking up much of the oxygen.
However, Gangnam Style still managed to rack up the most views thanks to viral-power, showing that (professionally produced) unfamiliar content can still take off.
The lessons for developers: you can make in in the App Store, but it has to be a strong product first. Getting to a point where traction is possible will require incubators and a supportive developmental community.