The promised update is now live in The Elder Scrolls Online, marking the launch of ESO: Tamriel Unlimited, allowing the MMORPG to be played without any subscription fees. This support page has a FAQ addressing questions this may raise, and this Guide to ESO Plus Premium Membership explains the benefits that remain for those willing to pay for them. This post offers complete patch notes on the new version 2.1, beginning with this overview:

We’re excited to introduce The Elder Scrolls Online: Tamriel Unlimited! If you previously purchased ESO, your characters are ready to continue the adventure right now. And if you’re currently subscribed, you’ve automatically become a member of ESO Plus, our new premium membership!

We also have a number of fixes included in this patch including resolutions for the remaining issues with Enlightenment, random UI error messages, and more. Be sure to check out the full list of fixes below. This patch will be approximately 1-2GB in size.

We’re thrilled to begin this new chapter of The Elder Scrolls Online. Welcome to Tamriel Unlimited!