[sliken]

Chromebooks are full laptops, with a full OS, running a full browser, windowing system, notification system, device drivers, network stack, etc.

You can even run Android apps, or linux native apps under chrome://settings.

You can edit that spreadsheet locally, just click on offline editing.

Sure when you click save it saves to the cloud, but that's about the largest difference between Chrome OS and Linux, they are running the same kernel after all.