Well, i do think they will fail, not co-exist, because they have a business model that will be disrupted by blockchains, and all they proven over time is that they care first and second about money...
They should mutate a lot to survive, which i find hard they could do... I actually feel they are getting as much as they can from these networks now, as they know they wont last forever...
But again, this is all speculation of course, no one cant really know how the future will look like! ;)