Hardware that ships with Linux installed isn't as rare as it used to be. System 76, Purism, ZaReason, and others have been cranking out hardware with Linux pre-installed for quite a while now. But while those of us who use Linux may know these companies, there's only one household name that currently ships laptops with Linux installed—Dell.
Dell's Project Sputnik has been dedicating resources to creating a "just works" experience for Dell Ultrabooks running Ubuntu for nearly four years now. Lead developer Barton George, who leads the effort, and other developers have been writing code where necessary (and contributing that code back upstream) and refining the user experience to a point where everything does indeed just work.