Very interesting. I hadn't really done any reading ito it, but of course the official Marine Corp internal rhetoric on the subject was that they pioneered the digital design (as well as the slanted breast pockets). It's obviously very similar to the Canadian, and why the Army didn't go closer I don't know. The US Army uniforms are about the most useless camouflage colors ever.
Of course all my old stuff is a mix of MARPAT Desert/Forest, I never saw any urban versions released.