They said that creepers should not only get new texture packs but something even better. The texture of the creeper should be a heat gradient that changes according to the biome they are in.

Minecraft: Xbox 360 Edition 1.7.3 update and skin pack coming — play as a Creeper! Sebastian Haley. July 6, 2012 11:53 AM ... Next, bring on the texture packs and Adventure Update!