One of the things I'd like to see is a speaker system for mains and especially the center that has a much wider dispersion. Do horns, or electrostatics, or whatever, have a wider dispersion than what Axiom is currently using?

Perhaps a curved center in a WTWTW design, where the center is thicker than the ends. This may place the sweet spot to slightly off center on both sides in front of the tweeters, but it would also expand the available sweet spot listening area.