The 12.5-inch Latitude 7290, 13.3-inch Latitude 7390, and 14-inch Latitude 7490 range will all get Kaby Lake-R and a few other internal changes.
https://www.notebookcheck.net/Dell-Latitude-7490-coming-with-Active-Steering-WiFi-and-Super-Low-Power-Display.272614.0.html