I beg to differ, there most definitely is a series of patented technologies that in total enable replacement of people, objects, environments and audio elements

I beg to differ, there most definitely is a series of patented technologies that in total enable replacement of people, objects, environments and audio elements in traditional media. That key is traditional, linear media. New forms of media, interactive forms, VR/AR and hybrids are wide open fields. That's a big reason new fields of technology are so exiting - it's not just interesting to us geeks, but valuable to the businesspeople.