I find myself flipping between yawn and cool, yawn in that we are getting the ballistic pie being cut into smaller less relevent pieces(Basically there nothing new under the sun). And cool at least thee is some measure of innovation and that is good or else we would all be shooting 223, 243, 30-06, 7 rem mag , 375 H&H or 458win after those everything would be just clutter
An beside at this stage the technology is pretty stable it would take somthing like a whole new propellent to get any real change or somthing like that.