My source tells me that the current "fusion z" line will be re-worked this spring with a few minor (mostly cosmetic) changes. My understanding is that the new series will look a lot like the new "gen 4" leather products.
On the rollaways I don't think that there will be any noticable changes aside from the loss of the leather embossing tag on the front.
Call your local Tumi store... someone there should have some details.