I'm calling it now: we've seen the last ipod classic update. When the touch goes to 64 GB this September, they'll kill off the classic. The touch has replaced the classic as the flagship model. The very name "classic" indicates it's an older design on the way out.
I know some people need/want more than 64 GB and will be sad to see the classic go, and I'm not saying it makes sense or I agree with it, but this is clearly the way we're headed. Maybe, *maybe* the classic has one more year (until the touch hits 128), but I doubt it. 64 GB is enough space to hold 98% of consumers' entire music libraries, and even if you have more than that, that's still a lot to take with you.
So IMO, the next update is ipod touch and nano in September. No shuffle because it was recently updated and no classic because it will be quietly killed off.