Developers Conference keynote, but the company has added support for MFi game controllers to its SDK. This means that rather than forcing developers to design only for the touchscreen, and hope it will work with whatever game controller add-on someone may have bought, devs can now code hardware controller support and expect it to work (assuming the controllers follow Apple's standards).
The standards haven't been finalized yet, but Touch Arcade has posted the image to the right, which shows two options being considered for the standard iOS game controller configuration. One looks like a simple iPhone case that would add a D-pad, four thumb buttons, and two shoulder buttons; and, the other has the body of a SEGA Genesis controller with the button configuration of a dual-stick SNES controller.
This could easily lead to a boom for accessory makers, and of course it also leads to questions about whether or not your iOS device may soon become a game controller for your Apple TV.