Savage Wombat
Hero
If wizards can actually miss, you can be sure they'll get miss damage.
It really depends on whether they revert to the old-style saving throw system. If the targets make saving throws against a fireball, they'll probably take half damage on a save as before, and miss damage will no longer be relevant.
If they stick with the caster targeting his opponent's DC, then miss damage will still exist in some form.