I was thinking about this subject last night. What do you mostly use your smartphone for? I ask this question because I have noticed you see these types of markets for smart phones.

Gaming - this being a growing trend. I know a lot of guys in my unit use theirs for gaming .

Social update- very common for the average user.

RSS and news feeds- I consider my self one for this type of market. I always try and stay up to date on Ubuntu and Linux gaming news.

Leisure or media player - songs, movies and TV shows . The phone is you're media player.

Integration - this is a another category I want to consider myself apart of and also have seen a lot in what people want in the IOS platform. Right now everything in my house runs Ubuntu except for 3 items my TV, smartphone and tablet. Now say Ubuntu, comes out with those 3 items . Easy sync or integration between is so key. Wow sorry got off topic. Is there any other types of markets I am missing?