For the majority of new content, there's no need to own them on disc. Watching them digitally is fine. But for some things, owning the disc is nicer. As well as the ability to watch it anywhere without worrying about subs, signing in, downloading/caps and more significantly, quality loss.
Compressing a video down to make it suitable for streaming is a lossy process. As well as a lower bitrate, quite often 5.1 sound is also compromised in favour of stereo. Owning the DVD or Blu-Ray means a film/show can be enjoyed in it's full glory, with no compromises on image or sound quality. No ads (beyond any at the start of the disc) and often some extras for fans are like a little icing on the cake.
One other thing is the ownership of the disc. With digital services there's nothing tangible, nothing to be traded or sold on, nothing to be lent to friends or given as a gift. Access to the content is strictly dependant on access to the Internet, a dependency which discs do not have.
Compressing a video down to make it suitable for streaming is a lossy process. As well as a lower bitrate, quite often 5.1 sound is also compromised in favour of stereo. Owning the DVD or Blu-Ray means a film/show can be enjoyed in it's full glory, with no compromises on image or sound quality. No ads (beyond any at the start of the disc) and often some extras for fans are like a little icing on the cake.
One other thing is the ownership of the disc. With digital services there's nothing tangible, nothing to be traded or sold on, nothing to be lent to friends or given as a gift. Access to the content is strictly dependant on access to the Internet, a dependency which discs do not have.