i agree with the fact that a curved screen "can" fix pin cushioning if its an issue on a anamorphic lens. however, Im still debating if a curved screen has some considerations when being used with a zoom feature. mainly because if the projector is placed closer to the screen or the apature has to be more open your using more of the glass and the natural curve of the lens comes into play more.....and that could cause some of those edge distorsions. a curved screen could fix that in theory. i would also think that if the projector is at the tail end of its throw ratio its using only the middle part of the glass and the curve of the glass has less if any influence on the picture.
my issue is i want the biggest screen i can get but the projector has to be as closely mounted to the screen as possible which means its going to be zoomed all the way open and that curve of the lens might have some influence on the picture.