I have been here every year since 1991, mainly for the NAB convention. While it was already huge back then, it grew to humongous gradually in the late 20th and early 21st century.
However, the Internet happened and huge trade shows (the kind that draws over 100000 people in a foreign city) is becoming a relic of the past.
I think it will fade slowly into history and will be remembered with found memories (overpriced low quality food, painful transportation to get in or out, mobile phone trying to use oversubscribe networks and not free wifi).