StarBlazer: At one point in their existence, someone probably said that the studios and distributors would never allow streaming as it would undermine the whole DVD distribution stranglehold they had.
Netflix have enough market force to push for change - it may take a couple of years but I think it will happen.
That is still largely the case.
Try finding any very new blockbuster DVD release movie on Netflix (even US Netflix) They are vanishingly rare.
The only way these movies exist for streaming is a rental option (e.g. iTunes) which costs basically the same as a DVD rental. this is because stuidos don't want to undermine the lucrative DVD rental/purchase market. They don't really care about older movies, since they generate very little in DVD purchase and rental, so they allow them to go on streaming services.
Netflix can't put new movies onto it's subscription service until quite a while after DVD release happens.
Here are the top ten current DVD rentals for the USA.
1.1 Dumb and Dumber To (2014)
2.5 Big Hero 6 (2014) 33
3.3 Annie (2014)
4.2 The Hunger Games: Mockingjay - Part 1(2014)
5.4 Birdman: Or (The Unexpected Virtue of Ignorance) (2014)
6.10 Horrible Bosses 2 (2014) 33
7.6 Nightcrawler (2014) 47
8.New Beyond the Lights (2014) 33
9.7 Top Five (2014) 12
10.8 Vice (2015/II) 12
How many of these are on the USA Netflix catalogue?
I haven't checked them all, but I believe the answer is ZERO.