Why are Christian symbols popular in anime? It's not because they're inherently compelling in any way, it's because they're from a foreign culture and they have exotic appeal.
Why do people in the US practice meditation? Is it because they rationally considered all available peer-reviewed evidence, or because meditation is associated with a foreign culture and has exotic appeal?
If meditation is actually good, and it eventually permeates society, I'll just be a late adopter. No account I've ever read has pitched it as so wonderful a tool that being a late adopter would be terribly painful for me.
But for now, I'm predicting that meditation will be a fad. I don't expect to see ~5-10 meditation centers in my hometown in 15 years.