"If you've already connected your Google account to your PC using the Mail, People, or Calendar apps, this change doesn’t affect you at all. Your email, calendar, and contacts will continue to sync properly."
But it appears the reality is more complicated. The Verge noted prominetly yesterday that Google calendar sync was disabled with the latest app update releases. And, indeed, that's the case.
With the new set of Mail/Calendar/People updates, Microsoft is switching all syncrhonization of Gmail accounts to IMAP. The "official" statement, provided to me on March 26 via a spokesperson, is: "In light of Google's decision to change its support for EAS, we are now using IMAP for those customers that wish to connect their Gmail accounts."
"To sync your email and contacts, you’ll need to remove your existing Google accounts and reconnect them. It’s important to note that if you have more than one Google account, you can only get your contacts for one account. And you'll no longer be able to sync your Google calendar with the Calendar app."
A spokesperson confirmed that Calendar won't update with Google information, even for existing connections, once a user moves to the updated Windows 8/Windows RT Calendar app. IMAP is an email-only protocol, so I guess this shouldn't be too surprising. But I don't think the Softies made this plan as clear as they perhaps should have back in January.