Wireframes are no longer enough.

Ability to wireframe is probably one of the most mentioned skills on a product mangers resume. It used to be that you would walk into an interview and explain that as a part of your process for product development you would jump into Balsamiq or some other mockup tool and throw together wires for your suggested feature. This would lead to handing wires over to the Design team which in turn would hand off designs to engineers after receiving PM blessing and stakeholder buy in.