8k is a gimmick worse than 3D, dont let them push it. Demand higher refresh rates, 4:4:4 chroma, true 10-12 bit color HDR, high nits, etc. Stuff that matters. We do not need games that are 300GB in size for textures we will not be able to resolve any differently at the distance human beings sit from screens (even when uncomfortably close like 4 feet from a 65inch screen, try that for a day)
Unless you are 4 feet away from a 65 inch screen, you will not be able to tell the difference between 4k and 8k when gaming like you could with 1440p->4k. Its an extremely lame tactic to sell screens and gpus when we have several very important improvements we can still make that do make a difference.