Yes, but the book explained Voldemort's death so it made sense. In the movie, it was like he simply wasn't as invincible as we thought.
Speaking of power here`s something that bugs me. What defines a wizards power level? There doesn`t seem to be a mana system, since they don`t get tired while casting, most spells aren`t ranked by a power level (expept the "kitten you" superspells that dumbledor and voldemort use). So is the power in the wand like it was sudgested? But since the wand chooses the wizard doesn`t that mean that you are born with the power you will ever have? I never really understood that part. Also y u no argue, moral values no more?