Have to say I hate the resolution's Dell offers on the XPS13. 3840 x 2400 is simply ludicrous and IMO it would far better to offer a 2560 x 1600 option instead as the flagship resolution. I have a 15.6" XPS15 and the 4K screen in hindsight was stupid, but the 1920 x 1080p option is woeful.
In a 15.6" model I would love to see a 2880 x 1800 option offered. Better battery life, and scaling could be set to 150% rather than 200%.
Today, Dell has launched the next-generation XPS 13 with an updated design, Intel Alder Lake-U, and a 13.4-inch display with an aspect ratio of 16:10 and an optional 4K resolution.