Okay so, 144 Hz I get that. The 240 Hz prototypes I already found total overkill, but now a 480Hz monitor slash prototype display has been spotted. 

The news was spotted by hothardware who noticed this info at Blur Busters. Again, true 480 Hz. Blur Busters apparently have hands on the prototype and claim that the difference between 240Hz and 480Hz is noticeable to the human eye.

"Doubling the refresh rate, halves the distance between image copies in the stroboscopic effect. This also applies to things like FPS games (e.g. flick-turns while staring at crosshairs—and then seeing the 'stepping effect' of the turn," Blur Busters explains. "In fact, even the 1000Hz report-rate of a gaming mouse is becoming a limiting factor—mouse manufacturers such as Razer, Logitech, SteelSeries, ASUS ROG, Zowie, and others, now need to release true-2000 Hz position report rates."

Honestly, 480Hz refresh rates are just silly when you ask me. Your most modern graphics cards and CPUc would not be even able to keep up at 480 fps. Personally I'd stick to 144 Hz, HDR, Free/GSYNC and Ultra or WQHD. But yeah, it seems that 1080p 480 Hz monitors are in development.

480Hz Monitor Display Panel Prototype Spotted