This is the Latitude 12 7275, another two-in-one offering.
In keeping with Dell's emphasis now on design and premium materials:
It’s our thinnest and lightest 12.5” business-class 2-in-1, designed to go wherever work takes you. With an innovative magnetic connection, transition seamlessly from laptop to tablet mode at a moments notice. Enjoy stunning resolution with an UltraSharpTM 4K UHD display, optimized for Windows 10 touch interaction. And it’s built with premium materials, including magnesium alloy and edge-to-edge Corning Gorilla Glass for ultimate durability.
During the press event, vice president and general manager of Dell's Commercial PC Group Kirk Schnell said that they actually consider it a 3-in-1 machine, because "you can go from tablet to laptop and ultimately to desktop environment."