Sadly for fans of strange merchandising, Sega aren't teasing a game with actual fodder for felines. Instead the video shows the song entitled "Cat Food" by Vocaloid composer "doriko", as seen in the next installment of the Hatsune Miku: Project DIVA rhythm game series. While it hasn't been stated direct which platform this particular trailer is for, judging by the polygon count and job listings from back in October, it's most likely for the PlayStation Vita. It's due next year.
The choice of platform isn't too much of a surprise, seeing as Sega's shown particular affection for Sony's platforms when it comes to Vocaloids, with three Project DIVA games on the PSP, two PS3-based Dreamy Theater expansions, and even an appearance on the PS3 version of Namco Bandai's own idol game, Idolm@ster 2. Nintendo fans needn't feel deprived, though, as the 3DS will finally get a Vocaloid game in the form of Hatsune Miku: Project Mirai, which seems to play like Project DIVA, but rocks a super-deformed style and more casual-friendly difficulty level.
Project DIVA trailer is full of cat food [Japanator]