Just like the Western world, Koreans will eventually get tired of pretty robots singing bubblegum songs and doing the same overtly choreographed performances
I'm only speaking visuals being dated.
In terms of the music, they literally grab from the same demo pools that the pop girls do, so the fact that anybody is trying to drag is a bit of a mess.
The only company that doesn't do much of that is YG Entertainment (2NE1 hihihi).
Just like the Western world, Koreans will eventually get tired of pretty robots singing bubblegum songs and doing the same overtly choreographed performances