Apparently Dave Nutting https://www.youtube.com/watch?v=UzkGNL2AxP0 's reimplementation of Taito's 1975 Western Gun/Gun Fight for Midway was the first arcade video game to use a microprocessor, though I don't know if the original implementation was as 'hard-wired' as Pong or if it had evolved more towards being a full computer in TTL. https://en.wikipedia.org/wiki/Gun_Fight
Simmilarly, when the IBM 1401 https://www.ibm.com/history/1401 launched in 1959 it replaced large numbers of plugboard-based tabulating systems http://www.columbia.edu/cu/computinghistory/plugboard.html in offices.