Swipe Gestures look amazing, especially the animation for Safari and switching between full screen apps. How come three-finger swipe-up is now assigned to something? I need that for "Up one level" in Bridge. I wish Finder did that too! Are four-finger left-right swipes customizable finally? I hate the app switcher it's totally pointless as it doesn't work with apps that have more than one window open in different spaces.
I still don't like Mission Control. I prefer Exposé and I don't see how Mission Control is different.
Resume sounds amazing, I hate logging out to switch to integrated graphics each time when I unplug my MBP, and log out AGAIN to switch back to discreet graphics. This will make it easier.
AirDrop sounds amazing, I hate using Skype to transfer files between computers that are in separate rooms, though I think this won't work between Macs and PCs?
Disappearing scroll bars are totally awesome, although there is no mention about them anywhere, they are visible on the videos.
What's the difference between Versions and Time Machine? The only thing I can think of is that instead of cluttering an external drive, it fills up your internal drive, and doesn't save every hour but rather each time you hit Save. It may be cool but when working on large files (PSDs) this will fill up your hard drive in a matter of days.
I really like the idea of no open apps, and instead letting the OS manage what apps are in memory and which ones are "hibernating". I always have too many apps open (Photoshop, Bridge, Safari, iTunes, Mail, Skype, Adium) and I can't afford having any of those closed at any time. I would love the OS to manage that for me effectively, as I can't have more than 4 GB of RAM.
The App Store is not a feature of Lion, as I already have it and I'm on Snow Leopard. WTF?
And Launchpad... WTF? It's just a folder with App shortcuts in it... and it's full screen and doesn't allow multi-tasking. What exactly is the advantage of this, compared to just having a folder with Apps in it? Or even a Dock Stack set to "Grid". It's less intrusive and does the SAME thing, doesn't it?