Trademork reports. This is the most recent story in a long line of rumors and speculation, all suggesting that Apple may be entering the games market sometime in the near future.
The revised trademark will associate "Apple" with a number of gaming-related categories, including "hand-held units for playing video games", and "stand alone video game machines". Of interest here is the specificity of these categories; the iPod may be a device which allows game playing, but it is arguably not a device "for" playing games, leading us to believe the trademark extension may reference an entirely new product dedicated to gaming.
On a possibly related note, Apple posted a job listing in September of last year for a "Game Producer/Designer." The position may be related to game development on the iPod series, however, and not to any new product.