The interface has a fresh, more modern look to it. You will notice the large icons on the toolbar. If you prefer to revert to the small icon look of previous versions, you do this by right clicking the toolbar and unchecking 'Use large icons'.
You will also notice that there are a lot less icons or buttons showing on the toolbar, which was deemed confusing for new users. This is because the toolbars, and associated buttons, now open in context to the feature you're using.
Another small change to the UI is to increase the web URL address bar.
The last improvement to the UI is the expanded windows size for the Command or Utility output. Prior to this, output showed up in a small window. Now execution results pop up in its own Utility Execution Results window which makes it much easier to read.
