Facebook may become bigger than google, but they'll never be more important than google. If facebook would suffer a 1 month outage it would be a 'meh' event, nothing you couldn't live without. If google would be down for as much as 24 hours it would seriously impact a very large number of people and businesses.
I think you're overestimating the chances that in the future Google will play as important a role as it does today. Google was the first to solve the "search problem". They won't be the last, and finding information is only one aspect of one thing people do on the internet. Google has not been very good at making money in any other way. Competitors in the search engine business are emerging. I can totally foresee a s…
Google definitely wasn't the first to solve the search problem.