I laughed a bit inside, and a bit more on the outside, when I first read that part of the title on
ANN. Just imagine the
perplexity of Suzumiya Haruhi or some other 2D anime character, watching back over us in mind-boggling 3D... And then trying to convince themselves that a flat chest is fine, too!

Reading on, however, revealed a completely different perspective. The news actually announces a (pseudo-)3D animation short based on the
Mari-sama ga Miteru franchise, summarizing the story so far. The feature will be screened in 10 Japanese movie theaters on New Year's Eve, and to top it off, attendees will also be entertained with a sneak preview of
Maria-sama ga Miteru 4th Season, episode numero 1.
And here's some clarification on the 3D thingie, if needed, from ANN:
"the event will also have the first official 3D footage from the franchise. The Maria-sama ga Miteru Special Digest will recap the previous two television seasons and the video season using digital 3D technology. The event will also screen special messages from the two main voice actresses, Kana Ueda (Yumi Fukuzawa) and Miki Itou (Sachiko Ogasawara)."