The first and I hope not last monitor with that panel is ASUS PG258Q.
It's not same overclocked panel like we have on all 24" 144Hz TN monitor and that's good.

press release http://press.asus.com/PressReleases/p/ASUS-An...putex-2016

ROG Swift PG258Q gaming monitor
ROG Swift PG258Q is a 24.5-inch gaming monitor that features a Full HD (1920 x 1080) panel with a native 240Hz refresh rate. Swift PG258Q has a 1ms gray-to-gray (GTG) response time and built-in NVIDIA® G-SYNC™ technology to eliminate lag and frame rate stutter for the smoothest, fastest, and most breathtaking gaming visuals imaginable. Its narrow bezel design makes it perfect for expansive multi-display setups.
Swift PG258Q has a revolutionary design finished in ROG's new Armor Titanium and Plasma Copper color scheme, and has built-in ROG light effects on its stand to add ambience to gaming set-ups. In addition, Swift PG258Q features ASUS GamePlus in-game enhancements and ASUS GameVisual technology for optimized gaming visuals.

Also ASUS announced 24" 180Hz TN monitor - ASUS PG248Q. Looks like it's based on same panel just like any current 24" 144Hz monitor.