They already have. Well, at least in non high end audio circles. Except now they are digital not analog, done with software, not hardware and bundled into various devices.
For example My desktop PC has more elaborate equalization and sound processing functionality built into its software than most people have ever owned.
Digital changes the game when it comes to potential for signal processing applications, good old fashioned equalization being just one of the more recognizable ones. When applied appropriately and done well, it should be all up side and virtually no down. Its like the ultimate Swiss Army knife for audio. Could greatly reduce the need for other kinds of tweaks that audiophiles are historically fond of, if properly mastered.
For example My desktop PC has more elaborate equalization and sound processing functionality built into its software than most people have ever owned.
Digital changes the game when it comes to potential for signal processing applications, good old fashioned equalization being just one of the more recognizable ones. When applied appropriately and done well, it should be all up side and virtually no down. Its like the ultimate Swiss Army knife for audio. Could greatly reduce the need for other kinds of tweaks that audiophiles are historically fond of, if properly mastered.