I understand the argument that the 1D-C is for a professional market with little concern or price. But there are still several reasons this is WAY overpriced. There is already a crowded market of excellent cameras for those with deep pockets from RED, Sony, Panasonic, Canons C500, and others. Figure, Canon is merely updating an existing camera. They are not creating a new body geared for videographers, they are not adding professional audio, they are not adding nd filters, and they still lack many features pro video cameras contain. The $3000 Nikon D800 exports uncompressed HD, records 1080p video at 30fps, and the Sony A77 records 1080p @60fps as well. The only real improvements over any other DSLR is the ability to record 4k at 24fps. The fact is a DSLR sucks as a video camera by nature but due to the low price of the 5D mark II, we compromised and dealt with the missing features, lack of sharpness, crappy format, and awkward (for video) body style.
Not to mention Canon is not known for sharp video even at 1080p with the sensor only resolving around 800 lines of resolution. The test footage for the 1Dx and 5D mark iii does not seem to improve this much at all either, even with the new lower compression format. For $15000, buy a real video camera. For $4000, I would deal with the shortcomings of using a DSLR for good enough footage at a lower price. For those who have unlimited budgets, i'm not sure why they would pick this over the RED, Sony, or even the C500.