NHK, a broadcaster in Japan, is working with 8K Television production. Problem is, almost all the video content ever produced is in a lower resolution, the maximum usually being 4K. Try watch Arri Alexa video on an 8K TV. It probably would not work. The situation is worse for DVD quality video. I hear sometimes that film is the only certified medium for long term preservation, especially on digital projects. If some people can't do that, then how do you preserve digital video not only for long term but also for higher resolutions, especially since 4K is starting to become popular among TV makers?
Jordan Newell White