Mocap requires a pretty significant amount of manual cleanup. The VFX industry is not a fan of Andy Serkis's bragging, to say the least. =P
I was extremely impressed with this motion matching presentation from GDC 2016. It blew folks away at the time. That said it hasn't really taken off everywhere AFAIK. Although it's definitely used in places (sports games!) https://www.gdcvault.com/play/1023280/Motion-Matching-and-Th...
I guess I like the idea of "directing". But in terms of pure practicality I'm very skeptical. What does the directing toolset look like assuming we don't have full blown AGI? That's tough. And I'm not super bullish on AI for this type of thing. Although I've been consistently surprised by ML capabilities over the last year. So in 3 years I'll probably say "oh yeah it was obvious that ML could do that..."