I mean, the company that comes along and figures out how to do search better than Google is going to take practically the entire internet by storm. Maybe some sort of computational knowledge, data-driven AI will find its way into being, or something.
I'm quite excited about it though. I don't think it's impossible at all. I don't think Google really can be split apart either, since Alphabet sort of already did that. Google isn't forcing anybody out of business, and by their own methodology, that would be counterproductive. I mean, putting optic lines down only forces Comcast and the like to step their game up a bit, they are more than welcome to continue doing business, and customers are more than welcome to tell Google to fuck off if they'd prefer their competitors.
There are currently other search engines that still exist, like YaCy and DuckDuckGo, ixquick, and others. They wouldn't be around if they didn't think that there's something they can do better than Google.