Marty Cagan from SVPG has definitely taken a provocative stance with this post (link). He suggests that we should stop thinking about the job of product management as one of gathering and documenting requirements, that we should think instead of met and unmet needs! Furthermore that solutions may be inspired by technology and/or customers, suggesting to me at least the the product manager's remit extends to how customers use the product, not just the outward technical feature/properties of the product.
I'm impressed by the usefulness of this contrary perspective, it seems to make a subtle but valuable shift in the product manager's orientation and concerns.
