The biggest hindrance to OpenOffice dominance is Sun itself
One of the things that bothers me profusely about OpenOffice is Sun’s maniacal infatuation with controlling every square inch of OpenOffice, including all the copyrights to the code within it.
That in turn has left some contributors a bit on the perturbed side, if not downright screaming mad. Yet Sun is dead set on owning the copyright to every ounce of code contributed to OpenOffice, even going so far as to rewrite contributions to the project just so they can control the copyright of everything that goes into it. Now I can see where they might want to do this to protect themselves from legal entanglements caused by copied code.
But sadly, the methods they’re using actually would, and likely will, blow right up in their face. And we all know a certain somebody that would love to see that happen, if not actually help it to occur.