When copying multiple files via Explorer, if it runs into duplicates, it ask you if you wish to replace the file, keep both files (appending a 2 on to the file being copied) or skip the file and then continues with the copy.
When copying multiple files and it runs into a file that has an error (such as a file in use), it now prompts you to "try again", "skip" or cancel. In the old days it would stop the copying process and you would not know which files it missed.
They added a "new folder" option to the Folders...