A couple of notes from Moscone WWDC (woohoo!)
Menubar transparency can be turned off
However after trying it out, you never want to, it makes you more focused, and less distracted. I thought it was ugly, then tried it. It's actually very good for productivity.
It's fast.
Stacks are fantastic.
The new finder is absolutely the best part. How many years have we wanted a cocoa finder? It's HERE!!!!! Browsing network shares is no longer met with delays, it's using the fast Unix finally. I can try to mount 10 shares without every seeing a cursor.
Proper multi-threaded support. No more pauses when clicking on the menubar or anything else. Apps keep chugging along.
No more beachball so far.
It's the perfect OS for productivity. No crazy changes, just refinement to the extreme.
It's a beautiful thing!
DVD player has been able to play HD-DVDs for a long time. It has blu-ray and HD-DVD settings in prefs now.
Dock works fine on the sides, 3D but the icons are sideways (proper) with shadow. Looks awesome on the side. I'd post pictures but I'd rather not be in Apple prison.