The dual-core 12.5-inch Zenbook 3 chassis will be refreshed into the quad-core 14-inch Zenbook 3 Deluxe while the newer and likely pricier 13-inch Zenbook 13 will carry 4K UHD and GeForce MX150 options.
https://www.notebookcheck.net/Asus-announces-Zenbook-13-and-Zenbook-3-Deluxe-with-Kaby-Lake-R-and-GeForce-MX150-graphics.245942.0.html