Canon's latest DSLR is the full-frame EOS-1D X, which it calls "the film-maker’s DSLR" as it deals with most of problems video users have with the 5D Mark II and 7D cameras, with full control over audio levels, focus, exposure and frame rate during recording. It's advanced processing deals with moiré, rolling shutter effects and chromatic aberration, and it can record intra frame (full frames rather than reference frames) H.264.
For the full story, take a look at our main blog: Canon EOS-1D X filmmaker’s DSLR