There's not a mainstream use case for 4k content. Show watchers don't care enough about the quality improvement to pay their streaming provider $5 more for the 4k stream.

Even the gaming enthusiast market has rejected 4k, opting to spend their precious gpu cycles on refresh rate improvements instead.

Panel marketers are going to figure out what number consumers comprehend and make it bigger regardless. Hence their focus on 4k, 8k, and now these silly refresh rates.

But their big problem is that consumer behavior is currently bottlenecked by streaming bandwidth and GPU cycles. Two things panel manufacturers have no control over.

Buy a nice 1440p @ 120 Hz panel and ride out the next decade in comfort.