I just wonder if I miss a point, are these titles harder than they seem? Why people look for too ambitious goals ( next CoD , next WoW ) or extremely proven ones ( Sandy Brush, Highway Surfer etc)
Well, I would say because they are "proven formulas" and things a small studio can get a few coin out off.
And I don't know much about programming but I think that genre might be overlooked due to the complex programming behind it. Not only that but easely assessible game engines like UDK and Unity don't really excel in with Strategy functionalities and gameplay (IMHO).