Both Lincoln & The Master but for different reasons than what I think you're talking about. Lincoln is, admittedly, Spielberg's most personal work and it took the man 20 years to finally make it. As part of Spielberg's legacy, it is a pivotal film, one of his most important, and will be very important in 20 years. To many, myself included, Paul Thomas Anderson is the closest thing to Kubrick there has ever been and is one of the finest filmmakers working today. His movies are always festival and critically adored, complex, wonderfully acted and usually lauded to the highest cinema degree. And as someone who only releases a film every five or so years, he is only now REALLY coming into his own as a true visionary. The Master is probably his most challenging work, and it's really showing his development. In my humble opinion, There Will Be Blood is the best film of the last 20 years and he's only entering his prime.