The Planet of the Orchids (1976)

A screen adaptation of Herbert W. Franke's science fiction novel "The Orchid's Cage". The story is set in a world where humans have been reduced to immobile plants, orchids. They are fed and entertained by machines. They have had everything in life, they have no need for anything but pleasure, and so they have gradually degenerated. Humans appear on the alien planet, but they too are just having fun. Soon they too become orchids.