What is landscape urbanism?

From SPUR:

A subject of growing interest globally, landscape urbanism is seen as a way to reimagine large cities and aging infrastructures. Landscape urbanism emphasizes the integration of natural, structural, cultural and infrastructural layers of urban space, and suggests a reexamination of current planning models. SPUR brings together Marco Esposito of SWA Group, Kevin Conger of CMG Landscape Architecture and Mona El Khafif of California College of the Arts, to explore whether this new buzzword offers a useful framework for understanding and shaping the city’s interconnected systems.