With a modern game engine and PBR shaders you can definitely get the same look as the movie. If you try to render it exactly the way they did it with a software renderer on the CPU then maybe. Their rendering software, Reyes, didn’t use raytracing or path tracing at all. You can read about it here

graphics.pixar.com/library/Reyes/paper.pdf

I only skimmed it but it seems what they call micro polygons is just subdivision. Which can also be done realtime with tessellation.