But OS X did have the consolidation of file transfer dialog boxes for a long time.
(Although it still has woeful conflict resolution http://cl.ly/9Zqg)
Lion lets you keep both.
Lion does not let you skip files that you don't want copied, if they already exist. Which is a ridiculous choice, and one that is very hard to work around.
That's what I thought, but I took that screenshot from lion.