Pink Floyd FINALLY Releases Live At Pompeii

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.

The new directors cut has had new scenes cut in that that are visual(e.g psychedelic effects) and are not of the band playing,there is no new material filmed or otherwise of Pink Floyd on this disc.
The original version is on the disc and according to the critics is preferable to the so-called new version.
Perhaps the print is better.
Stil no idea what Rx8man means about WYWH.