Boxing v mma

IS MMA going to over take boxing and is the future of boxing in doubt?? i think over the last few decades boxing as totally decreased in popularity, once when big fights were held in 100,000 seater places, like ali once fought a nobody in blue lewis at croke park and these days the biggest fight in modern time mayweather v oscar was held at the mgm, in this day and age i feel a top mma card would out sell a top boxing card both in seats and ppv... i think the big advantage mma has over boxing is the big fights that everyone wants to see in mma happen, where as boxing can have two or three great champions at the same weight but never fight each other!!! heavy weight boxing as always being the main attraction but with the state of heavy weight boxing at the min could mma over take it.... biggest nams in mma are know equally globally known as the biggest names in boxing, dont get me wrong i prefer boxing i just feel boxing as a whole needs a good shake up, unify belts or something... get the big fights on!!! i know boxing still pays much more but is the future MMA??