I think mobile platforms is a good sector for your game if it's done in less than half a year from now on or if it's already finished. Simply everyone, esp. the big publishers and studios, focus or start to focus this sector, thus the days of acceptance for low quality in terms of visuals or polishing "because it's just a mobile game" are over. The effort to create and the complexity of mobile games increase steadily, the statement that simple games can be successful there is worthless because there are millions of them, the market is already flooded.

Instead, I think we should focus on developing games for PC (/ Mac/ Linux). The market becomes smaller as publishers focus on console, mobile and social gaming and most modern games try to be as cinematic and accessible as possible. They ignore the market of millions of core gamers that often would prefer deep (maybe not easily accessible) gameplay, gamers who'd prefer a Quake (f.i. with simple/ old-school graphics) over a COD or people who are looking for games such as Cave Story or (2D) Metroid.
Thus I think we can target an audience of millions of people, who are btw. a different kind of gamers that are aware of and value indie games (where everything above 99cent or even for free isn't too expensive), when we develop f.i. simple or complex sidescrollers, highscore based games such as AaaAaAAA!! that don't require a lot of content and long single player campaigns or old-school fun shooters, esp. games for the non-casual gamer.

According to this I heavily support a port to non-Windows computers over a port to a mobile platform.

EDIT: The feature mobile/ multiple platform support probably is a pretty good advertising for GameStudio these days, but I doubt that any A8/ A9 game on Android will be a good advertising for GameStudio because those games are short-living and easily forgotten together with their developers and engines.