If some new tweaks to the Android Steam Mobile app are any indication, Valve may be headed towards selling non-gaming apps via Android. That's speculation at the moment, as Valve hasn't provided any details that might explain why categories such as Accounting and Audio Production recently popped up. Given that the categories aren't appearing in Steam for the PC and iPhone, it's safe to guess that we might be seeing an app store that could contend with the likes of Google Play and Amazon's Appstore For Android.
These categories in the Android Steam Mobile app are new. They're also empty, for now.To check it out for yourself, open the Steam app on your Android phone and find the Genre category index. The first page has the game genres you normally see (Action, Adventure, etc.), but the second page lists the non-gaming categories in alphabetical order: Accounting, Animation & Modeling, Audio Production, and more. The categories themselves are empty, so we'll have to wait to hear back from Valve about what's in, er, store.