This means Businesses moving to Office 365 can continue to use the most popular Relational Database Design Tool in the world without jumping through hoops to do so.
Obviously, it won't happen overnight, so your patience is still needed, but as the announcement says:
"How soon you'll see Access as part of your installation depends upon the Office 365 update channel your admin designated for your subscription. For Access users with Office 365 on the Current Channel, you'll see Access added to your installation in December 2016 or January 2017. For Access users with Office 365 on the Deferred Channel, you'll see Access added to your installation in June 2017. To find out what update channel you're on with Office 365, go to File > Account within one of the desktop applications. Your update channel is listed above the version number."
Those of us in the MVP community have been crowing publicly about the changes we see over in Redmond for a while. Proof of the validity of that optimism is rolling out on a regular schedule these days.
Bookmark Office Support at MS to keep up-to-date with the enhancements coming our way.