From the very first time that waraxe cleaved that Draugr's face and snapped his neck backwards, we've taken note of the wonderful impact of, well, impact. As was also shown early during the dual-wield fight against the lone bandit with a shield, both enemies and the PC are impacted by the force of melee attacks and recoil when struck, even if the damage taken is not sufficient to kill. This is not new to the series, but greatly improved.
Magic, on the other hand, is made of cotton. I can count two large explosions from the fireball spell seen in the videos that, despite damaging their targets, did not impact them in the slightest (one against a frost troll [who should be weak to fire] and one against the dragon priest [very thin and frail, albeit possibly magic-resistant]). Now, other spells, such as that (frost?) rune placed on the ground and chain lightning, impacted their targets a great deal, but only after death. IIRC, this is the same as in Oblivion--targets do nothing more than take damage from anything other than melee (that is, spells or magic) up until they actually die, in which case force is finally applied to them. Granted, it might make sense for someone not to be pushed back or something from the force of a flamethrower type of spell (frost/shockthrower?), but EXPLOSIONS DON'T EVEN NUDGE TARGETS.
I kindly request that you fine folks bring attention to this detail and refuse to allow Beth to ignore it; even a tiny dagger may stagger an opponent whereas a fifteen-foot wide (powerful) explosion will not. With mechanics like this, all the spells may as well just apply flashy-looking poison damage :sadvaultboy: