I think this is definitely true for the iPod Touch as it is the next logical step for the device, especially with Apple finally moving to allow video.
As for the iPod Nano, I think that also could be true. There are so many features that separate the Nano from the Touch. It would also give people a reason to upgrade this year without completely changing the device (as it seems there is not much more they can do with it).
As for the classic, will it even remain after this year? I think so, but I don't see Apple bothering to even include a camera in it, although it could happen.
As for the iPod Nano, I think that also could be true. There are so many features that separate the Nano from the Touch. It would also give people a reason to upgrade this year without completely changing the device (as it seems there is not much more they can do with it).
As for the classic, will it even remain after this year? I think so, but I don't see Apple bothering to even include a camera in it, although it could happen.