As of early 2001, it seems this
look got
out of style. Nowadays, you can cross
Hachiko square without seeing a
single gyaru-kei, at least not full-fledged ones, when only half a year ago, that was unthinkable.
The dyed hair is still quite popular, but the tans, make-up and platform shoes are not, at least not in combination.
As for what will replace it, I'm seeing more and more girls wearing pretty eye-hurting combinations of bright colors: orange, yellow, greep and pink, usually on a swater top and a short (but not mini) skirt. Maybe this will soon become as ubiquitous as the gyaru-kei was; there's probably already a word for it.