I want to reiterate in this post on just why the Chrome OS in a tablet form factor makes sense. The key is the versatility of Chrome OS that can run on different form factors. Previously I noted scepticism that a tablet running a mobile operating system can function as a laptop replacement (Apple marketed this idea when it first released the larger iPad Pro). However, with Chrome OS now supporting Android applications, I think it can serve, for many users, the dual purpose of a laptop and tablet.
Apple's iPad Pro essentially runs a mobile OS and Microsoft's Surface 2-in-1 devices runs a desktop operating system with some tablet features built-in. In contrast, Chromebooks that come in diverse form factors are better suited to make use of both a mobile and desktop interface. When required Chromebooks can now run mobile-based applications and for other tasks, there is a desktop interface.
This cross-pollination between a mobile-centric operating system and web-centric desktop operating system offers the best of both worlds in education. In the case of Android, there are useful applications for the classroom, e.g., Google Arts & Culture and Google Expeditions. Further, many Chromebooks now support touch and pen input that make use of different features in these applications. The desktop interface, on the other hand, works better for multi-tasking between tabs and extensive writing in Google Docs.
Another issue to consider is that many Chromebooks are ruggedised and spill-resistant. The Apple iPad, in comparison, requires the extra purchase of a rugged keyboard combo if it is to be feasibly used in the classroom.
Chrome OS has matured into a versatile operating system that can potentially work on different hardware. Neither Microsoft nor Apple offers anything similar to Chrome OS and I predict Chromebooks to continue to dominate and expand in the education sector.