Once the "W" series Garmins come out, do we really think the 480 has much life left in it? I guess there are a few little features that it does, like displaying an HSI on it's screen, but with the advent of EFIS systems, especially when/if they support TSO-146 (will require a WAAS GPS and TSO-146a support), I wonder if the 480 won't be relegated to "maintainence mode" and all the focus put on the "W" series.
Truth be known that already has happened. The only "feature" that I know of for the 480, since it's TSO-146a certification, was really a bug fix. Remember, it can't support all the WAAS GPS approaches without more memory and the appropriate code changes.
Makes one wonder what Garmin really bought UPS AT for?