I understand the compression point but when shooting 6:1 or better, the noise is not amplified by compression. I've never seen compression artefact (on my jobs at least) with REDCODE. But I've seen noise from 1200 asa up. Now I like noise and can live with it... if the projects permits it obviously.
I don't beleive there is a need for another recording device. And I'm a big believer that the one who makes uncompressed RAW for motion picture, make a big mistake. (Hope Aaton will develop some compression ratio in their camera...)