Redditor u/stblr uncovered recent Geekbench benchmarks for a previously-unheard of Dell "Precision 5750", likely a 17-inch device with compact dimensions that would also be analogous to any future XPS 17 design.
https://www.notebookcheck.net/Dell-Precision-5750-shows-up-on-Geekbench-suggests-17-inch-XPS-may-be-coming-soon.445993.0.html