Current Desktop in Lion 10.7:

Mission Control Shot:

So I've been using Mac OS 10.7 Lion for a couple of days now... some people are bashing it especially those who haven't even used it yet. I have though and I think it's good however... I had to change a few settings like turning off the new reverse scrolling... I didn't have to turn the indicators back on the dock though as they where just there when I booted up Lion.. I guess they are off when you start it fresh rather than an upgrade. Speaking of which I experienced no ill effects from upgrading rather than doing a clean install.
I like the new virtual desktop system called Mission Control as I have always liked virtual desktops and used spaces heavily in Snow Leopard. I do like the full screen that auto creates a desktop just for the app you put full screen and removes the desktop when you close the app. So instead of devoting a whole desktop to Safari for example like I used to I just set it to full screen and let it manage that itself. Desktop 1 like usual is usually reserved for chat stuff, e-mail and things like that. I was a tad lost though because they removed the assign apps to desktops preferences in the system preferences and you just decide that by right clicking on the dock icon and choose to assign the app from there. I like how it has built in support for having a different wallpaper on each desktop just by opening the desktop pictures preference pane in each one and changing it.
It migrated my old space settings and I wanted to change a couple of them and didn't now how until I figured that out. So pretty much it's going to take a little settling into and the few bugs I've encountered will probably get fixed in point upgrades. It certainly isn't the train wreck some people are making it out to be though. But a couple of my old games (American McGee's Alice and the Jedi Knight games) aren't working and they need patches and or for me to switch them over to a WINE wrapped version.
Luckily I never really kept any PowerPC applications around so I don't miss them now that the built in PowerPC emulation called Rosetta is gone. Some people especially at Inside Mac Games are really taking that personally\hard though.
Performance wise the new OS seems at least as good if not better than 10.6 Snow Leopard for me... and games seem to run faster if anything. It's a bit rough around the edges though as can be expected from an initial release.