There won't be an appreciable difference unless compression is left to a minimum and the video bit depth and color gamut are significantly widened from current standards.
Audiophile grade, 24 bit, bit-for-bit lossless compressed, object-oriented based sound must also be a part of the equation. Any object soundtrack should be able to be scalable to 64 speakers (just like commercial venues). The consumer electronics to provide the output rendering can then be made flexible and modular (as it is not now).
The fact that it's not all about pixel count must be an undercurrent of all future specs.
If they don't add all these things NOW, UHD and even 8k will be an absolute failure.