As for BD, things like Planet Earth are a must in BD. I buy my TV series like X-Files and Stargate in DVD but I would buy the LoTR Trilogy in BD as well as anything Pixar.
I did a lot of video only shows in the 70’s and 80’s. On many of them I did the original 525 recordings, so I know what they looked like when the pictures left the stage, and I know what going down the generations during editing did to them. I recently saw one of my old Sonny and Cher's that had been remastered, and it looked better than it did coming in from the studio. I was impressed.