Contrary to Windows Phone, FxOS is not aiming to be competing against the high end Android or iOS devices. Nor will it be appealing to current consumers who have a smartphone in their pockets. It's targeting consumers that currently hold feature phones (mostly Nokia) that can either not afford a smartphone, or just a very low-end Android that performs terrible. FxOS is not here to be the ultimate OS for developers, but to bring a fully featured smartphone experience to Latin America, South East Asia, Balkans, etc.