The 15-inch Zephyrus S GX531 will launch in late September with the 17-inch ROG GL704 Scar II to follow a few days later. The new Zephyrus will be thinner and leaner than the GX501 at just $1900 compared to almost $3000 when the GX501 launched last year.
https://www.notebookcheck.net/Asus-ROG-Zephyrus-S-GX531-now-available-for-almost-1000-cheaper-than-the-GX501.328494.0.html