I think the parent is referring to Android apps being available on Chromebooks now. However, that's still in a pilot/beta phase, and has not deployed broadly yet.

My tablet comment was just meant to give context to why I don't think having access to Android apps on Chromebooks is a game changer in K-5 education.

Probably the higher up you get the less students are using "educational software" and more just common productivity programs and I'd suspect the gap between platforms fades away there for general purpose reports, presentations, etc.

Some people claim Chromebooks already have the best education software (as in learning stuff, handing in reports and teachers grading them online, not playing games).

Given that advanced CAD software nowadays run inside a browser, I think the chromebooks will work just fine even the higher up you go.

I'd be surprised if Android tablets have any significant uptake in business or education settings. Not only do they generally lack software support in terms of security updates (imagine connecting your desktop PC to the internet without access to Windows updates), but also their apps are often just blown-up phone apps.

I know there are some school districts that use Kindle Fires but I haven't seen other Android tablets.

I think this is a deliberate move by Google. For education they wanted to push chromebooks not tablets.

I think they did the right choice, in this context chromebooks are significantly better than tablets, phones or even "real" laptops.