8k was always going to have issues and likely die.

When it comes to TVs most people don't like sitting too close. The bigger the TV, the further back you want to sit. Anyone who's sat in the front seats of a cinema can attest to this.

While the human eye doesn't have a resolution, we can work out an effective one from our ability to discern angular differences. Combined these, and the 'optimum' resolution for a TV is actually just under HD. In the real world, the extra pixels of 4K help, particularly after compression.

Basically HD is good enough for uncompressed video, 4K helps with compression artifacts. 8k offers nothing new.