In one word.., hyper-specialization. Is that a word?
Anyway, consultants are quickly going to be moving away from having careers where they work for a consulting firm for many years and move to more of a freelancing type of model where they will get extremely focused on a particular set of offerings and domain.
They’ll gather specific domain experience where they’ll be able to bring highly focused insights and research pertaining to that domain only.
This level of specialization will allow individuals to become well known for their prowess in that area and create a relationship between consultants that foster a referral system, much the same way you see in the medical field, that isn’t in place now.