He pushed landscape painting into the stratosphere, demolished one-point perspective, invented the Los Angeles look, embraced iPads, created dazzling stage sets for theatre and opera … David Hockney didn’t just appear out of nowhere like some fully formed artistic wunderkind. His work was a synthesis of so much that came before and was happening around him. He took the ideas of minimalism and abstraction, fused them with the traditions of portraiture, and filtered it all through the innovatio...