More storage is fun, but still having the usb2 connection makes these products a bit less funny to use. These products will work best with usb3. Until then it's a waiting game not only for the new port to be released but to fill the ipod with content with syncing.
But for you? With streaming to the ipod then you don't need that big drive space. I think if a camera is added to the ipod touch then it will be for all models even the cheap one.