we're definitely there in the K-12 market. The only email kids know is Gmail. The only browser they know is Chrome. The only OS a lot of them now know is ChromeOS, on the Chromebook their school was basically given "for free." their editors are Google Docs, Google Sheets, they use Google Hangounts to chat. Their phones are Android with all of the Google services. They know YouTube, Google Play, Google Music, etc. YouTube again for music.
Some have iPhones
.. and their Apple ID is a @gmail.com address.
It terrifies me just how deeply Google has entrenched itself in the K-12 education market. At least when Apple was everywhere, we still had Microsoft Office vs Appleworks/etc.
Google is now more "the internet" than AOL could have dreamed of.