Count me in the "not particularly surprised" group. J-Pop is as image-driven as American pop, perhaps even more so. Don't get me wrong, I do like some Japanese music; Kotoko's "Re-sublimity" is in my iTunes library's Top 100 by play count.
Korean pop was the big thing in Asia for a while (1998-2004), but "K-pop" appears stuck in the Backstreet Boys/NSync era. Maybe holograms could revive classic K-pop groups like H.O.T., whose members (especially Moon Hee Jun) often had outrageously shaped hair that would lend itself well to a stylized 3-D imaging.
This hologram thing has been tried in Western pop music, most notably with a "live" duet between Madonna and Gorillaz, if I remember correctly.
