I haven't seen any major changes here.. the logo font looks different, now that you mention it. But that's about it.
Maybe they haven't rolled it out here yet?
hmm, some people's account changed but I left feedback saying i don't like it and went back to the old layout. ...it was weird, I couldn't edit anything.
Like you said, ...maybe that's because it's not officially released yet. :/ idk..
(I think you can try it out if you scroll to the very bottom of YouTube and click "Test New Features" in the bottom footer.)
Every time YouTube updates layout, people say "Oh noes, I miss the old one, cuz I like it better", because in general people dont like changes.
I like how they switch up the look once in a while to spice up things.
Ya, a litte variety is nice but this is also effecting related video views. ...Because they made the video super big and moved the "related videos" down, the related video click traffic is dropping.
...but i guess people watch videos longer now, on the plus side.