I think the article sets the right tone when it says:
4K broadcasting technology will require the updating of a myriad of hardware in order to facilitate the increased resolution and bandwidth. That includes editing and preview monitors, digital storage and editing, and of course the towers and bandwidth requirements.
It made me curious to look up some details of the long development of the present HDTV digital standard
High-definition television - Wikipedia, the free encyclopedia. Especially the timing.
As early as 1979, Japanese state broadcaster NHK first developed an analog form similar to today's HDTV standard. Satellite broadcasts were tested in 1989, with regular commercial use in 1994. It took quite a long time before something similar was adopted in the USA, with field testing during the 1990s. It required, among other things, the transition from analog broadcasting to digital broadcasting and effective digital compression.
Of course technology never develops at the same pace. But I think 4k TV as a commercial reality is a long way off. There is still plenty of video source material today that is not available at the present HDTV standards.