Hell, I thought the practice would die (or at least slow down) when Netflix started transitioning away from syndicated TV and movies; this never happened. Netflix will totally geoblock their own shows so they can, say, release a cartoon on a weekly basis in Japan but in binge-watchable chunks in America.
You will continue to see anything more premium than a high-subscriber-count YouTube channel be geoblocked until and unless one of two things happens:
- Geoblocking gets so heinous that it starts to push people away from shows and services, beyond ordinary subscriber churn. This is unlikely - the US is the biggest market for a lot of this stuff, and that's a market full of people who have no desire to watch foreign media ahead of an official release. Hell, most of us don't even have passports, and think that you can just move to another country by asking politely.
- Some country or trading bloc gets enough of a bug up their butt about getting releases late that they start amending copyright law to ban the practice. AFAIK, I've heard Australia was considering banning region locked DVD players at one point; and that the EU was considering forcing online video providers to license content on an EU-wide basis.