All the Star Wars films are 2.35:1 hard matte. You lose "half the picture" in this way although with other full screen versions of films, you might lose less or even gain image (open matte).
Here's a site that compares the wide and full screen dvd's of the Harry Potter movies.
http://plum.cream.org/HP/index.htm

Does anyone know if these films were open matte?
Better off Dead (1.85) 1985
Lemony Snicket (1.85) 2004
Peter Pan (live action 2003) 2.40:1 but was it super 35 like Titanic?
Airplane & the Naked Gun trilogy (1.85)