He didn't say he was working on it, and you aren't the first person to ask for jpeg album art. If you want to "do your part", start working on an efficient way to incorporate it rather than saying "someone else should do this."
Most ideas never happen just because nobody works on them. This one has people for and against it, but it's really impossible to decide until someone actually comes up with an implementation and shows how much, or how little, impact it would have.