Isn't it just inherently more expensive to manufacture blu-ray discs and players than DVD, regardless of licencing fees? Blu-ray players are already pretty cheap, but that doesn't seem to have moved the needle much on adoption of the format. I don't think we'll ever see blu-rays being cheaper...
For the average person, streaming makes more sense anyway. With the exception of titles for kids, they don't buy films, period. They watch something once and that's it. It was the same in DVD's heyday, but streaming saves them the trip to Blocklbuster.