QuoteI'm not really sure if that is really necessary.
Of course, I play fast paced esport-like multiplayer game (CS2 custom servers modes) and even 144 Hz is often not enough. PS: I'm not playing at 4K either, so, no, to reach 240 Hz or more, one doesn't need a 4090, let alone a 5090, desktop.
QuoteAnything above 120 Hz seems like placebo.
Oh no..Why do you think there are 240, 360, 500 and soon more Hz? Do your own "research" by reading / watching Youtube vids. You can even start here: blurbusters.com/massive-upgrade-with-120-vs-480-hz-oled-much-more-visible-than-60-vs-120-hz-even-for-office. Especially with OLED's <1 ms pixel response times (and 4 ms for the fastest IPS (true 4ms and slightly lower, if counting bad overdriving results (also, so nice that OLED doesn't require any overdriving))), anything over 250 Hz is possible now, thanks to OLED.