This trend of one-UI-fits-all-devices is just plain fail. We don't even need Firefox and Gecko on phones, especially not until it's underlying architecture is fixed up (i.e. Electrolysis needs to become Firefox).
Nokia and RIM were in the business of selling devices--Mozilla is not, and should not be. Mozilla needs to refocus on its core mission of making the best browser for computers (i.e. systems with keyboards and mice).