Didn't mean to say that patch pockets are a requirement, only that they are a casual aspect of a jacket and therefore would be best for complimenting jeans.
This works in my eyes. Sid is one of the few guys that can carry jeans and a SC because his tailoring is naturally softer and more relaxed. The softer shoulders and bolder pattern of the SC (in a material that is neither rigid nor smooth), matched with the sloppily tied tie and wrinkled shirt all work well with jeans. Again, though, I will not openly condone ties with jeans. That only invites more catastrophe.
I will admit I am a bit biased, however, as I know his personality and his air of geniality and nonchalance is what really makes his style. Granted I still think he needs to show less ankle.