Ultima is a series of fantasy computer role-playing games from Origin Systems, Inc. Ultima was created by Richard Garriott, a.k.a. Lord British. Several games of the series are considered seminal games of their genre.
Other changes include an overhaul of the housing system, a new party system for adventuring in groups, changes in skill management and some cosmetic changes to the login screens.
The new interface design is nice, especially the option of having your playing field in a window, instead of full-screen with all your other little windows clogging the picture.
In the words of the Ultima IX website: “Prepare to embark on an adventure beyond imagination with the return of the best selling role-playing series of all time.