Great comments, John. However, I stand by my assertion 100%! Right brain thinking IS critical. I know from experience. I say that as both someone who has run marketing department in high-tech, created products, and has a strong left-brain and right-brain honed by many years doing improvisation. I am not saying here that we should jettison left-brained skills. On the contrary, I am advocate of better integration of both - bringing in right-brained skills to work together with left-brain thinking, so we use the best of both. We need both. Brain science on creativity is becoming better understood but is still very much in its infancy - see Charles Limb's latest TED talk. Moreover, check out Dan Pink's books on the need for right-brained folks within the corporate enterprise. The issue has been that right-brain thinkig in corporate America - and in our educational system - has been under-valued. I am familiar with Witkins' work.
Yes, these ideas are not new. I think what's changed is that a) companies are more willing to employ different techniques than in the past; 2) the management science surrounding these approaches is becoming better documented and becoming more accepted. The brain science to better understand this stuff is also a burgeoning field. And, finally, you have social technologies allowing new ways of co-creation that didn't exist in the past. So now older ideas meet with new ways of thinking about them and putting them into practice.