The new 14-inch systems are notable for their updated CPUs and lighter designs that won't impact MIL-STD-810G performance. Expect to drop at least $1400 USD for the entry-level 5420 or upwards of $3500 USD for the flagship 7424.
https://www.notebookcheck.net/Dell-intros-Latitude-Rugged-5420-5424-and-7424-with-new-designs-and-8th-gen-Intel-Core-processors.344091.0.html