30 years ago was 1990. I built my first PC in that year, a 10Mhz Turbo XT with 640K of RAM. I was working at a "direct mail marketing" (junk mail) business that had 3 employees and 4 PCs. I'd owned a Commodore 64 since 1983 and used IBM PCjr, Apple IIs and TRS-80s in school (the latter two were released in 1977).
But aside from that bit of nitpicking, I agree there's no way to predict what we'll have in 2050. Maybe the few survivors will be living in caves, or maybe we'll all have our own horde of personal AIs sharing our brains and each of us will act as a sort of hive mind. Maybe Behringer will go out of business. Who knows?