"Any challenger to a market where one player holds 80 percent share not only has to build a better mousetrap but improve upon the mouse," said Jonathan Spira, chief analyst at Basex, an IT research firm specializing in knowledge sharing and collaboration.
--"Amazon Challenges iPod," article in Red Herring, 16 February 2006
Block that metaphor! ~Yeah, I'd sure buy an improved mousetrap from someone who's also made a better mouse.~
I suppose "improve upon" might mean something like "make less objectionable." But I don't think he thought it through that carefully; I think he just thought it sounded catchy.