Symptom of the Universe
What makes is a "good" depiction though? Is there a conan of books that say "and this is what a unicorn shall look like?" Are their debates among scholars over what can seen as a unicorn?
Obviously not because fantasy creatures are not products of an objective reality, they are a cultural construction (in the fullest sense). As such, any claim that "Hollywood makes bad unicorns" is ridiculous because there is no objective standard to judge a "true" unicorn because no true unicorns exist.
Just because something is a cultural construction doesn't mean it doesn't have standards. All Gods of any religion are "cultural constructions", yet they are specifically described. Ra is not Allah. And the basis for fantasy creatures is a part of history, so in many ways it is important to keep them historically correct.
chaotiquewhim
The 'horse-with-a-horn' image is a widely accepted one for unicorns; it was in all the fairy tales I grew up with. In that sense, it isn't wrong; this is what a lot of people envision a unicorn as.
Just because the majority accepts it doesn't mean it's right. In history, once, the majority believed the world is flat. And they were wrong. I'm not saying that how unicorns are portrayed is as important as whether the earth is flat or not, because it's not. But it shows that the majority isn't always the way to go.
kimika56
I have to agree with this. It seems to me that this was what I was taught a unicorn was. I've also heard that a unicorn is supposed to be Dragon-like, but that never made sense to me when I was little. The horse with a horn, it was what I was taught and raised with, so it makes a little more sense to me.
The dragon-like unicorn you heard of would be one of the oriental unicorns. It has the body of a dragon, the legs of a stag and a single horn.