The demo will give you a pretty good impression of what has been improved in the game. First and foremost there are maps for each realm, showing your location in that realm. The stats section in the character screen is more informative now, and the status bar has received a major polishing.
The full version will contain a bunch of additional high level items and a new challenge, beating everything you have seen so far. As some of you might know this is only the first of several updates to come. We will add new content to the game on a regular basis and make sure that your high level hero will never have to rest.