Canon officially announced 2 new cameras, the C500 and the EOS-1D C. From CanonRumors:
The Cinema EOS C500/C500 PL digital cinematography cameras will not only support 4K-resolution video but also outputs this as a 10-bit uncompressed RAW data stream with no de-Bayering. The cameras offer the additional versatility of being able to output quad full-HD (3840 x 2160), 2K (2048 x 1080), full HD (1920 x 1080), and other imaging options. All of these digital image source formats fully conform to established SMPTE production standards. All 4K formats can be selected to operate from one to 60 frames per second. The cameras employ a 12-bit RGB 4:4:4 signal format during 2K output, which can be selected to operate from one to 60 frames-per-second (fps) as well. If switched to a 10-bit YCrCb 4:2:2 mode, the camera can operate up to 120 fps.
Delivering outstanding video performance, the compact, lightweight EOS-1D C provides video recording at 4K (4096 x 2160-pixel) or Full HD (1920 x 1080-pixel) resolution to support high-end motion picture, television production and other advanced imaging applications.
Equipped with an 18.1-megapixel full-frame 24mm x 36mm Canon CMOS sensor, the camera records 8-bit 4:2:2 Motion JPEG 4K video to the camera’s CF memory card at 24 frames-per-second (fps) or Full HD 1920 x 1080 video at selectable frame rates from 24p to 60p, making it possible for next-generation visual expression with even higher image-quality and resolution performance.
UPDATE: If you're just interested in a quick pixel-peeping spec list, F-Stoppers has you coverd. Along with a gallery of pics to peruse.