Mobile app discoverability is a major problem - application developers find it hard to become visible to end consumers. This leads to problems where a small number of more visible publishers get the lions share of the revenue http://www.forbes.com/sites/chuckjones/2012/12/06/top-25-developers-receive-half-of-app-store-revenue/Is there a major opportunity in solving this problem?
Put another way, are we at AltaVista level of search engine for apps, but no one has yet come up with the Google of mobile app discoverability?