Got my copy early and have just finished. A BIG improvement over the 2010 release - natural colours are back and the teal and orange is gone. The colours are desaturated compared to the 2010 Blu-ray and look much more realistic. Compare the colour of Parker's green cotton shirt between the two releases (the close up shot of him after slamming the incinerator unit down on the table).
The Space Jockey reveal has thankfully been fixed - no neon green spacesuit for Kane - his original tan-coloured suit is back.
Had a look at the DC and am happy with the new colour grading for the DC scenes. The scenes, whilst upscales, don't detract too much from the 4K material either side of it.
All the edits made to the DC are there but not the updated effects - added stars and the three helmet lights, rounding the rock formation during sunrise, are missing - basically the DC without the reworked visual effects. This may qualify as a third version of the DC?
I was hoping the audio would be fixed for the overhead shot of Brett (exclusive to the DC), you can hear his footsteps while still standing motionless, looking around for Jones.
I enjoyed this 40th anniversary edition. A definite step up from the 2010 Anthology release.