To a screaming halt

On page 47 the quotation “Aesthetic postmodernism is distinguished by the creation of an imaginary universe of flotation and fluidity that reflects this vast process of deterritorialization by means of which capitalism accomplishes its goal.” I feel as though Bourriaud lost me here. What imaginary universe is he referring to? I re-read this part several times and still was unsure of how he came to this conclusion. Can we discuss this?