I mean, I can't imagine someone in 1955 saying "Thirty years from now will be conservative" or someone in 2009 saying "Just wait, the conservative populist revolt is coming".
Why does the future always "automatically" have to be liberal?
Conservatism is at best a fallback in the event of the failure of innovation and reform. Educational conservatism would involve the rejection of the look-say method in reading and the "New Math" after those got bad results. Social conservatism would require that loosey-goosey styles of child-raising be abandoned when they get bad results. Cultural conservatism might involve a rediscovery of the merits of 'old dead males' whose merit is obvious (Vermeer, Bach, Tolstoy) in the wake of garbage expressing the unsavory desires of its creators as 'art'. Don't get me wrong: people outside the realm of 'dead white males' can now be supremely worthy of attention. The sicko who celebrates his pedophilia or the incompetent dabbler who shows his lack of knowledge of artistic conventions likely deserves to be ignored, of course. Economic conservatism could mean that governments reject radical measures to create economic equality that has no compelling cause for such.
Against a reactionary demagogue like Donald Trump, liberalism is the fallback position.
Social progress has tended to be toward liberal humanism. Alternatives such as feudalism (a return to which would be unconscionable), Bolshevism, fascism, Nazism, the Taliban, and ISIS are not only antithetical to liberalism but easily refuted by liberal humanism.