You'll note that those are, in fact, three Ds. Well done, everyone.
According to comments made at the event, which is intended to highlight the 1st Production Department's upcoming products, Kingdom Hearts 3D will emphasize action and speed, with 3D effects conveying a greater sense of height and distances (for flying or falling). When playing, you'll regularly switch between two of the franchise's Dexterous Dainty Dudes, Sora and Riku.
No announcements regarding a North American release of Kingdom Hearts 3D: Dream Drop Distance have been made.