I actually own the DVD. That's upsetting that they copied music. Same with Led Zepplin. It's a shame. I am a mild Floyd fanatic, btw. Now some FNM to mix it up. Mike Patton is another one of my favs.
I don't consider it a shame in a case like this, cuz a) Rick Wright was always extremely open about it, cited Miles, Bill Evans and Winton Kelly all the time; b) more than the others in Floyd, Rick was a jazz musician - according to him, that was
all he was, and all jazz is based on borrowing and improvising on riffs to one degree or another. Listen to Sketches of Spain. That is Miles redoing ooold Spanish music, but it is still one of the most original recordings ever. And c) the standard in jazz (prolly in blues too, but I was raised on jazz) is if the piece that has the lifted riff or progression sounds completely different than the original, then it's legitimate inspiration, not unoriginality. By no stretch of the imagination does Dark Side of the Moon sound anything like Kind of Blue or Sketches of Spain [and I'd know - three of my favorite albums, have listened to them for thousands of hours in various and sundry altered states]. And Miles did not feel that way - he was in the process of arranging Sketches for Jimi Hendrix to re-do when Jimi died. I think that would have changed music history.
But I also kind of get some of what you're saying. I've worshipped Syd Barrett since I was waaay to young to be listening to him (like 7 or 8 years old), and it is hard to find anything that sounded like Syd's solo work before him. But on the other hand, there are clear standard jazz and blues progressions on Piper at the Gates of Dawn as well as on DSM. they're being used in a totally original manner, and do not detract from the originality of Piper.
Nevertheless, give a listen to Sketches or Kind of Blue and then Dark Side. Can you identify any of the lifts? I only know them because Rick Wright pointed them out. None of my musician friends ever caught them on their own, even my sister, a pianist/guitar player and overall obnoxiously gifted musician, or my brother, a jazz sax player (in a band most jazz folks have heard of, but he doesn't want me posting details) and hard-core Floyd freak. And we were raised in the Church of Miles. Pops literally made us listen to at least one Miles album per week, usually right after Hebrew school "so we could hear what God really sounds like".