Orchestration and virtualisation
The concept of “network orchestration” is one of rapidly moving around workloads, or deploying a system from a template in minutes. If you are running any good virtualisation stack and have paid for management tools with all the blue crystals, then you know this is both easy and doable today if you so wish. (You can do it on metal with ghost and its compatriots, but it's slightly messier.)
The first issue to mind is cost. You have to pay not only for your virtualisation management tools, but for all the blue crystals necessary to really make them shine. You have to reinforce your backend infrastructure. Those VM templates have to live somewhere, and that takes storage. Your network has to be fast enough to handle the demands placed on it. You might even have to upgrade from your current setup to something involving the acronym "SAN" before you can play in this magical fairy world of high and rapid availability where you can "orchestrate" workloads on your network. (This is something that is only now becoming a realistic option for smaller shops.)
The second issue, and perhaps a bigger one, is that the concept or "orchestrating" a network of servers implies that the sum total of systems administration is really nothing more than provisioning. Provisioning of servers has indeed become easy, but you still have to the legwork of honest-to-goodness R&D. Someone has to make those templates. You have to patch test, version test, regression test, check, re-check and do it all over again. Somewhere someone has to be constantly testing the network to see how long deploying a template will take, or how long migrating a workload from one node to the other will take. Not all workloads are feasible to hot-move, and scenarios must be drawn up to handle this. Somewhere disaster planning and documentation all have to be done, all of which is part of the performance, but occurs "behind the scenes."
The business sees provisioning. They request a server, and moments later they have one working. In this sense server provisioning has almost become as easy as desktop provisioning. The operating environments are just spawns of some master copy somewhere and you move on.
It is dangerous to use words like "orchestrating" because it's far too simple for others in the business to forget the amount of practice an orchestra requires.