What are the current "speaker trends" in your opinions?

Be it cones, stats, horns, planers ...or whatever other technology, is there anything new/worthwhile out there?  I know that there was the AMT "air motion transformer" of the ESS days,etc.  Many technologies advance and sometimes refinements of existing technology is the mainstay.   I am not real current in my readings or notice of advertising/reviews and would appreciate anything readers can share.