Overrated? No. However, I think people should slow down a bit an absorb the individual details contained in lower solutions. For instance, although most of my personal 3D work is rendered in 8K, I find the sweet spot for gaming to be 1440p/144Hz. Very few games take advantage of the higher fidelity, so there's no need to go gaga over 4K. It looks fabulous, don't get me wrong, but it's just a bit more than needed at the moment.
Higher hertz is much more of a priority for me.