It's not that no one has been doing this. Today at the DJ level it is different because technology, retail, and personal computing has made it possible for nearly everyone to do this and to allow the customer a level of content creation they formerly had to pay handsomely to get.
As far as the "experience" this "look" that you frequently post is not new. It's nearly 30 years old and originated with Bar Mitzvah and Quinceanera entertainers. It made it's way into weddings as a result of promotion and selling of the ideas through DJ conventions, etc. The resulting retail fenzy of products that followed are what feeds the less theatrical or creative inclined operators looking for off-the-shelf stage sets and turn-key effects.
Up lighting has been in use since the 1970s and facades as long as there have been game shows, etc. LEDs and Moving heads/mirrors represent a change in technology but not entirely a change in the experience. It's a faster, easier, and cheaper way to achieve a given effect and therefore makes it accessible to many more people.
I must admit, I find your negativity and "better than thou" barbs amusing at times.