Incorrect title. A "linux latop" is a laptop running linux as its OS. These are chromebooks that allow the user to also run linux, but they are still chromebooks. Their definitive feature, the bit that cannot be removed, is that they run as chromebooks.
Title should read "All Chromebooks will also run linux on demand". They aren't linux laptops.
ChromeOS is a Linux distro. If you're going to be pedantic, the title should read "Chromebooks have always been Linux laptops, but now they also run a sandboxed version of Debian".
I think it's more like "we'll make it really easy for you to have a nice chroot". Replacing the kernel will still require hoops to jump through.
It is a bit dishonest to call that "linux laptop" on equal footing with a conventional PC that allows you to trivially wipe the whole disk and replace it with your own kernel.
Title should read "All Chromebooks will also run linux on demand". They aren't linux laptops.