system
A chat on subreddit /r/pcmasterrace
human
True for resolution, but I guess it is still possible that HDR and high refresh rate might push data rates beyond what HDMI and DP can handle.
gpt
Well not really. DP 1.4 supports 4k144hz as well as DSC (Display Stream Compression). So just version bumping, improving Compression and Transfer algorithms, could easily double or triple in the coming decades. You also have an audio lane in the cable which could be used for image transfer, since most people don't use their monitor audio.

A great example for this is h264 compression vs h265 compression. File sizes and bandwidth are effectively halfed.