When Adobe InDesign was released (1999), it was soon called the Quark XPress killer. http://www.macworld.com/article/21336/2001/02/indesign.html

A couple of years later, most print shops had switched to InDesign.

(EDIT: The print shops I was working with had all switched to InDesign by 2002. I'm sure that it took longer in other parts of the country. Be that as it may, it has definitely become the layout package of choice.)

Well, Microsoft did kill Netscape Navigator. Only conflict within Microsoft between those who wanted to protect the revenue streams from Windows and Office against web apps and those who wanted keep on improving Internet Explorer even if the improvements erode those revenue streams allowed competing browsers to get the beachhead they have now.