PlayTime

Yeah forgot about that and I stand corrected although there were mixed feelings about the 4K restoration on the newer version in the Tati Box Set.
http://www.blu-ray.com/movies/Playtime-Blu-ray/108711/#Review
Maybe The Complete Monterey Pop Festival will be the 1st Criterion UHD disc/s! But definitely the first Bluray boxset to Bluray boxset upgrade to commemorate its 50th anniversary.

I've seen the restoration at IFC. My one complaint would be the grading on Cass Elliot's reaction shots during Janis Joplin's "Ball and Chain." That scene in general is tough to grade because they shot it with the aperture too open so not only are Joplin's shots blown out but the color on her was thrown off. It looks like the footage on Joplin may have been improved on the restoration by a fair margin but for some reason Elliot's reaction shots now look wrong, like you're looking at her through a strong pair of polarized shades. On the current 2009 Criterion BD, Elliot looks fine, with the color and exposure being in perfect balance.

Is there any chance (some info?) about more footage available (the outtakes) ?

There's only half-a song and just a complete song of Laura Nyro's performance... Although the backing-band couldn't follow the Eli And Thirteenth Confession jazzy style there's almost no footage of Laura Nyro in concert so

And I wouldn't complain about Janis Joplin with Big Brother complete concert (as well as the Who). But did D.A Pennebaker kept all these reels ?

I was already so surprised and pleased to discover so many bands when Criterion release Monterey on DVD with the DVD "outtakes".

There must be more outtakes available. Whether they can be legally released is another matter. Two clips that show up in atrocious quality on youtube are Pictures of Lily (THE WHO) amd Viola Lee Blues (GRATEFUL DEAD). Does anyone know of other unreleased takes?

You might find this helpful: https://en.wikipedia.org/wiki/Monterey_ ... _(set_list)