One of the complaints (and I share this complaint) regarding the NetFlix streaming service is that you cannot get the commentaries on the films. Another complaint that I have is no CC track but that's another story...
So, we have a startup that intends to fill the gap. They will stream films with commentaries as well as maintain a focus on classic film and art film. They are already in talks with Criterion to provide their content and commentaries as streams.
I hope they succeed. There is clearly a market niche that can be filled here nicely.
Check them out HERE.