Samsung is following the same pattern with their Galaxy S4 that they did with the Galaxy S3, but this time at an accelerated rate. They are already introducing new colors for the SGS4. Sprint will be getting a purple version and Verizon will be getting a brown version. This is the same thing they did with the SGS3, but it took a bit longer for it to happen with that device. Above is the evleak revealing the purple Sprint version coming, and below we actually have a leaked pic of the brown VZW version.
Wouldn't it be smarter to offer these alternate colored devices at the initial launch? That way the OEM could nab those few folks who want a more unique take on the device right when it comes out. Perhaps this is just a way to drum up sales after the initial fever pitch of the first launch has died out.