https://en.wikipedia.org/wiki/Baumol%27s_cost_disease
is more like it. That is, a Raspberry Pi is a much more powerful computer than the IBM 360/75 that planned the moon mission and costs orders of magnitude less but there has been no productivity improvement for baseball players.
Movies are an entirely business than they were back in the day. I remember Ghostbusters being in the theater for more than a year, and back then there were not just the first-run theaters that charged full price but many second-run theaters that had cut-rate double features (I remember seeing one of Gremlins and The Dark Crystal)
Today home video "competes" with theaters in some sense, a month of Netflix costs less than one movie ticket but the consequence isn't downward price pressures on theaters but exactly the opposite because home video demolished the second-run theaters leaving the first-run theaters to go on their own trajectory.
(And as for TV sets and things to plug into TV sets... Today's TV offers better quality than was imaginable in the 1960s and is cheap in comparison. It's astonishing what people spent for old game consoles like the Atari 2600, what a VCR and tapes cost in 1980, ...)