Camera guru Philip Bloom has gotten his hands on a Canon 1D X and used it to shoot parts of a music video. His verdict? "Is it worth the extra money? Yes and no. As a stills camera, it is second to none. Video wise, the video is much better than the Mk3, it’s better than the D800. Is it that much better taking into account the price? Yes and no. The Mk3 is still great and much smaller, lighter and cheaper. I wish the Mk3 image looked as smashing as this…I really hope Canon bring out a 7D replacement and a 60D replacement with All-I and the video quality that this camera produces."
Read more here on his blog.