I can't believe I haven't done this one already. I suppose the cover itself doesn't really have much to recommend it. It doesn't communicate anything about the story inside. The lettering is simplistic and almost cartoony.
On the other hand, the stark simplicity of the mostly white cover and simple titles does fit with the stark tone of a story that begins with "It was a bright cold day in April, and the clocks the clocks were striking thirteen."
If you want to see all the faces that this story has worn over the years take a look at Emily Temple's 'George Orwell's 1984 : A Visual History'