Yeah a lot of the new-age and unstable surface (bosu, Swiss ball) stuff, along with O-lifts, I think will be viewed in a similar light to mullets in another few years, though some of it can be pretty neat in its own way.
As regards performance, there's an interesting ranking. Basically, force Vonn or Reisch or whomever to stay off the bike/track (i.e., do no LT training), and they can't stay competitive. Force them to avoid squats, and maybe they do more sled work -- inconvenient, but no biggie. Sit around with a group of race camp coaches, and often no one still lifts (though if they were going to start racing again, yes they probably would get to the weight room again).
The EPO stories are waiting to be told for the sport, though the growth hormone chins prob peaked back in the 90s along with the heavy weight emphasis.
For rec skiers, there are also clear implications for crosstraining, though I suspect plyos and squats/O-lifts will always be crowd-pleasers just for entertainment value, and pushed by gym trainers for that reason.