There's a possibility that the Dell XPS 15 series will eventually offer consumers a choice of a mobile processor from AMD's Ryzen 3000 range. Although nothing concrete has been offered in terms of details or plans yet, the likelihood of an XPS 15 laptop taking advantage of Zen+ microarchitecture in the future is growing.
https://www.notebookcheck.net/2nd-Gen-AMD-Ryzen-3000-mobile-processors-could-make-their-way-into-Dell-XPS-15-laptops.423723.0.html