The vast majority of broadcast devices have an established and proven control layer. This is independent of the signal path, so it does not matter if you have legacy SDI equipment, IP-connected equipment, or a mixture of the two. Here we are just talking about control.
An obvious example is a production switcher. The control panel may have literally hundreds of buttons, but the connection from the panel to the electronics rack will normally be a single ethernet cable, rather than a very fat multi-core. System control is in software.
As I said, in playout automation we have been using that software control layer for decades. A central computer issues commands to the server, the switcher, the DVE and the graphics device to make things happen with frame accuracy.
It is easy to identify other applications where a single system controller could operate multiple pieces of equipment to perform complex tasks. You might want to control remote studios from a central location, for example, with the cameras, lights, microphones and graphics all under one user interface.
Given a sufficiently intelligent logic layer in the controller, and the ability to design appropriate user interfaces, then it is perfectly possible to hit our first target of seamless high quality. There is no reason why a simple unified control system should not deliver the professional output that we expect from fully equipped studios.