Do I Still buy DVD or Blu-ray?

When I built my Home theater I excitedly added a blu-ray player and Avatar was my first disk. How exciting that was with crystalline images and booming sound. When I bought Alice in Wonderland the marketing forced me to buy three disks. That was the last disk I bought. The Blu-ray player gathers dust. The streaming video gets all my business now. I don't like being forced into buying more than is reasonable, especially two extra disks. I shouldn't think it too long before Blu-ray quality can be streamed.