Chris Foresman:
First, Apple is reportedly working on a major update to the software that runs the Apple TV, which may be based on iOS. No details about the hardware are known, but it would make perfect sense for Apple to build it around an A4 variant and utilize iOS, which is already optimized for small devices and media consumption.
Perhaps but I saw the Mac mini update as the Apple TV update. You don’t make the Mac mini look like the Apple TV and give it an HDMI port for no reason – not if you are Apple that is.