Eventually. Eventually, we'll all be dead. Meanwhile, I'm still getting pptx files from professors that are meant for MS Office 2007 and work only very badly in open office. And hardware compatibility is still a problem.
Don't overgeneralize your experiences. If you work for Red Hat or a similar employer, obviously you're not going to have to use corporate or educational crapware that many others do.
I'm not overgeneralizing my experiences, but rather, observing past history. Nobody ever thought Lotus Notes would disappear either, but it did.
Most large corporates still have a lot of desktop crapware, but they're also deploying more webapps as they notice the time wasted maintaining client software. My past experiences at Red Hat were cited because I was once very interested in Linux desktops. I currently work at a conservative investment bank who's nevertheless busy deploying every new app via the browser.
PS. Re: OpenOffice opening OpenXML files, if Google Docs or Zoho don't solve your issue, you can access Microsoft Office 2010 web version from Firefox or Safari.
Don't overgeneralize your experiences. If you work for Red Hat or a similar employer, obviously you're not going to have to use corporate or educational crapware that many others do.