Whilst I agree with your idea with fashion acting as an antidote to reality; I think you're forgetting a vital point. Films, music and art are accessible and relatively affordable. High Fashion is neither. Furthermore, the people who have the luxury of purchasing these pieces - I think its safe to say - aren't affected by the economic crisis and don't need an escape.
Besides, one of the things that separates Marc Jacobs from the rest, and what makes him such a brilliant designer is that he obscures his references in his collections.
This is the first time he has blatantly taken an inspiration "The 80's" and not bothered to elaborate on it. That is what is most disappointing to me. Theres nothing new here because its way too referential.