Of the 15,000 horrible things about flying, fighting with the stranger next to you over the ARMREST is one of the worst. But this new invention may be the answer.
A company in Hong Kong called Paperclip Design just designed an airplane armrest that hooks UP at the end, to give it an upper level and a lower level. That way, BOTH people can use it comfortably.
There's no word if any airlines are actually considering this yet.
(Here's a picture of the armrest. Which looks like it doesn't REALLY solve the problem after all.)