I don't own a PS3 or an XBox360. Neither do many people who own iPads. A significant number of us are interested in playing games that are well suited to an ext

I don't own a PS3 or an XBox360. Neither do many people who own iPads. A significant number of us are interested in playing games that are well suited to an external controller, but are not interested in spending $200+ on a new game system (plus display), particularly when we already own a portable device that is capable of running the software but is limited by its native interface. I understand that the ability to plug in a controller can support lazy porting, but I suspect this is largely in addition to dedicated work on using the touch interface in creative ways on new projects. "Forcing" developers to confront new interaction design is an odd expectation for a popular consumer electronic device, and doesn't really justify denying a large group of users the opportunity to enjoy some great games/software through the use of an optional accessory.