Regardless of one's political views (myself a risk professional in the realm of global capital), Hardt and Negri's work is a remarkably vital, anticipatory and accurate analysis of the evolution of capital. For the more libertarian reader, I'd still strongly recommend the Empire, Multitude, Commonwealth "trilogy" given the significant accuracy of analysis the authors provide which is a necessary study regardless of ideology and advocacy. Capital is indeed becoming post-capital, infusing the cultural values brought forward through critical theory and postmodernism, and is increasingly anticipatory of poststructural thought. For those of us involved in the analysis and formation of corporate strategic thinking, these trends and their systemic ramifications are a necessary study.
I'd have to believe that a Fordist business person of the early 20th century would find the entire region of the humanities, critical theory, postmodernity, ethics, etc. to be a complete waste of time, yet as such, they would have complete difficulty in understanding our (post)modern workplace where differences are not only tolerated, but increasingly embraced given the intersubjective perceptual strength such multiplicities of difference bring toward product creation, marketing innovation, risk management, etc. From the perspective of Hardt and Negri's work, all three are necessary for the thoughtful, ethical professional (regardless of political or economic ideology) in the evaluation of the global system emerging.