The Armory system introduced in Update 32, will now support Mundus Stone settings in your Armory builds. You'll have a preview for each slot and you'll be able to see if the Mundus Stone applies. When you log in after update 34 is live, whatever Mundus Stone you have will be applied to all of your builds and you'll have to update manually if you choose.
There's also a new quick select wheel. This addition is designed to give you more space and to free up slots for your quick slot items. You can place items within a primary or a secondary wheel so you'll be able to use the things you've assigned, perhaps concentrating your combat items on the primary wheel but also still having quick access to other items on the secondary wheel. This change will also be able to use allies, emotes, tools, and mementos on the Wheel.
Update 34 also marks the arrival of Spanish language support. The Elder Scrolls Online will now fully support Spanish with in-game text and subtitles ( voiceovers remain in English), menus, dialogue, and other relevant text. Going forward, Spanish will be part of future content updates.
There are other changes and content coming in Update 34 that are not included in the preview. Some of the smaller changes include being able to change your title music, the implementation of AMD FSR for framerate boosts, as well as the start of the rollout of a new accessibility mode and more accessibility improvements to come.