I had commented on this as follows:
The students of Strategy, Management and Policy would miss the absence caused by the demise of CKP. His works on core competence, Innovation, Competition, future products, services and processes, poverty alleviation through bottom of the pyramid approach, to name few shall always guide us... Though he wont be there in physical form but his timeless works would always remind us of his presence amidst us...
His workplace, Univ of Michigan's business school had expressed its grief on his death in this obituary. Adi Ignatius (the editor of HBR) wrote a small piece in HBR and many people commented on that. It provides a good insight into the contribution of CKP. Further HBR has a dedicated page on the contributions of CKP and almost all the major works are included here. Francis Gouillart has given his obituary to this legend. The other contributions include:
Ariene Chang on WSJ
Strategy+Business had an interview with CKP which they published on 9th aug 2010 just after a day of his birthday... had he been surviving he would have been celebrating his 69th birthday... latest and good inteview....
An obituary page at Univ of Michigan website...