What could Apple’s 'unknown hardware' be?

A new beta of Apple’s iOS mobile software reportedly boasts references to a fourth-generation iPod Touch and maybe even a new iPad — not much of a surprise there. It’s the mention of some "unknown hardware" in the iOS beta code that’s raising eyebrows. Are we talking a new Apple TV, perhaps, or something new we haven’t seen yet?
The references to new Apple devices come from the latest beta of iOS 4.1, which is due for release in the "coming weeks," according to AppleInsider and its anonymous tipsters.

The USB configuration files of the new beta supposedly include a line of code with the text "iPod 4,1," which probably refers to a revamped, fourth-generation iPod Touch, says AppleInsider — not merely a revision of the third-generation Touch, which was earlier identified in the iOS firmware as "iPod 3,2."  LINK