I was thinking along the same lines, but I'll go further and say that iPod touch might be discontinued so that its component parts can be redirected to making more iPhones to meet the global demand in 70 countries.
iPod shuffle and iPod nano will remain, with iPod nano gaining more flash capacity. I think the iPod classic as the only hard drive-based device in the lineup, might be discontinued after another year. Apple doesn't break down iPod sales numbers by model, but my guess (just a wild ass guess) is that the classic line has been declining in sales.
With iPhones now at $199 and $299, the iPod lineup is looking unexciting, and I think revenue from iPod will decline in the coming one or two quarters. The standalone music market still has some life left, but Apple will need to reignite the flames with exciting new models.