The basic idea behind out-of-band networks is simple: Don't put management interfaces on a public subnet. ZPE's products do this in a very modern way- but they also provide a lot more security and flexibility than a run of the mill KVM solution.
Microsoft presented their modern security vision this past week at Gestalt IT’s Security Field Day 7. They highlighted the importance of interconnectedness as a security practice as part of their “SIEM+XDM” security vision. The technology is compelling, but questions about manageability (and cost) remain.