These may look like traditional wireframes, but they are not. The previsualization on the left can be experienced. Stakeholders can interact with data elements on the page, click through to other pages and explore their application. Traditional wireframes are two dimensional representations of the software. You cannot truly get a sense of how the application functions or flows.
The low resolution format still conveys key functions and features of the application, but can be very quickly modified during a JAM Session® so that you and your stakeholders can explore ideas, find innovation, and learn boundaries.