The LG UltraFine is a 27-inch 5K (5120 x 2880) IPS display. The maximum refresh rate is 60 Hz, so not the best for gaming; but it's designed for a Mac anyway. I've had a couple for over three years now and it's the best display for a Mac I know of, outside of Pro Display XDR, I suppose.
Yeah an alternative is always to just keep the screen I have now (1440@144) for gaming, and simply get a second screen for work with High DPI. Seems silly to get a 5K@120Hz mega expensive screen to play games at half resolution. I'll buy a bigger desk instead.