It seems legendary comics paying clever homage to past videogame dalliances continues. Hot on the heels of Jeff Parker doing so on Wizard of Id back in January, Garfield's Jim Davis, did something similar on a Sunday strip for July 20, 2014 (Joel D. Park, on the thread he started on AtariAge, is the one who pointed it out).
AtariProtos.com has excellent coverage of the ultimately unreleased 1983/84 Garfield game for the Atari 2600 that the comic header clearly mimics. While there is some speculation in the AtariAge thread about how Jim Davis "re-discovered" the 8-bit art, it seems to me that, based on the AtariProtos.com piece, in granting permission to release the ROM image, he was certainly aware of its existence, and relatively recently at that. Considering the near exact replication, it's likely he was working off of screenshots in his possession rather than a random Web search, and did so quite deliberately. Regardless of whether or not you're a fan of Garfield, if you're into videogames, it's hard to deny it's a cool move.