Sony's HMZ-T1 is a head-mounted 3D headset, to be released later this year in Japan. Two 1280×720 OLED displays, each just 7/10 of an inch across, create a virtual 750" screen. Perceived 20m from the viewer, it "corresponds to the sense of cinema as seen from a large central seat." It'll be 60,000 Yen ($785) from mid-november.
Source [Impress.co.jp]