In reply to Benjamin Ehinger.

The biggest user-facing change is really going to be the full-site editing feature. I am certain there will be a long transition period where this will basically stay the same for many people. Before it becomes useful, it will need to have buy-in from theme authors. And, right now, it's not anywhere near feature-complete enough for theme authors to really build on top of it. I'm not sure how this transitional period is going to work, but I'm guessing full-site editing is not going to be a reality for the majority of users for a while.

Much of this is a guessing-game at this point though. We'll see how it unfolds in the coming months.

As for the rest of the features, they shouldn't put much burden on user experience. They will mostly be a few extra optional features for those who want to explore them. The UI work that's happening right now, at least in my opinion, is making things easier.