Pink Floyd FINALLY Releases Live At Pompeii

I don't know about SACD, the DVD release will be on the shelves tomorrow and that's where I'll be right after work, so you can listen AND watch. They did a great job on both the CD and DVD for the Dark Side.

What year is this show?

No idea what you are talking about.
Live At Pompeii has been out on video for years,the DVD has no new extra original footage.
Also what do you mean for Wish You Were?
The album has been remastered three times in the 90's including the most recent excerpts on Echoes.
There is also the Mastersound release which still sounds great.

I believe "73", don't quote me, I'm picking it up after work today (DVD), if there still left.

The DVD contains a new "director's cut", as well the original concert performance. I don't know what has been added to the movie as I have not seen the original movie.

The picture quality is very good (I have the european PAL version), and the sound is OK. This recording would definitely not benefit from SACD treatment, so you can safely get the DVD. It's an essential document of pop history, and very enjoyable.