Its an interesting concept, which will further fragment the amount of attention that each individual piece can get. If the actors are AI generated, then we are also past the point there sex and nudity can't be part of the experience. It will likely be more attractive than anything else for that reason alone.
It'll be like YouTube, anyone can put out anything they want there, the vast majority of which will be bad, but there are still good content creators making high quality videos.
I don't think so. There is a qualitative difference between youtube and what can be made for streaming, but there are also entire groups of things that are not on youtube: there are lots of video essays, but basically no TV shows over multiple episodes, in any genre.
This is currently a limitation, but it doesn't have to be and with the new system it won't be.