Mike Gartenberg at Jupiter's a clever chap, so let's play along with his speculation on Microsoft's plans take on the iPod:
[I]t’s likely we’re going to see Zune focused on the music enthusiast marketplace. The real aficionados who could appreciate features like community or the ability to share music. Look for this to follow the Xbox approach, which targeted the high end gamers early on. I’d expect the message will be to try to marginalize the iPod as being the music player that dad, mom or your little sister uses, and Zune is for the cool kids.
That's an interesting idea: make Zune Mountain Dew to iPod's Coke.
Still, we all know which brand sells more sugar water.