ARM-based Chromebooks are not new. But IIRC they were mostly 32-bit machines with few cores running at relatively slow clock speeds. Still they were great machines for many purposes, and very inexpensive.

What seems to be new here is that this machine is built on the Snapdragon 7C, which is an 8-core[0] 64-bit machine running at 2.4 Ghz. And it has a touchscreen, a 180-degree hinge, and it will sell for $399/£399. I'll probably buy one if I can boot real Linux on it.

[0] Not sure if those are 8 actual cores or 4 hyperthreaded cores.