Technologizer relate the story of the Polaroid’s SX-70: The Art and Science of the Nearly Impossible:
Most important, unlike any other Polaroid, the SX-70 asked the photographer to do nothing more than focus, press the shutter, and pluck the snapshot as it emerged from the camera–and then watch it develop in daylight. It was the first camera to realize what Edwin Land said had been his dream all along: “absolute one-step photography.”
This was in 1972 and it was a landmark towards the true instant photography. Long before digital.