This 3D version is either a new master from 35mm source, or from the master created for the Muse High Def Laserdisc, which was also used, I believe, as a source for the Standard Laserdisc, and eventually the HDTV version.
It is in no way a 4K restoration. As the low resolution of the effects shots wouldn't allow that, it would create all sorts of artifacts like banding (which is already showing in the early close-up Lake shots of the Brachios)and lack of detail, etc.
Infact the lack of detail is already apparent from the trailer. Look at the close-up shots of Goldblum's face. You cannot see much detail there at all, it looks unnaturally smooth. While it has moderate detail (more than the previous blu ray), but the overall look of the film is smooth, as if it was shot with soft focus, which was the case with JP2 but not JP1. The colour is gorgeous this time, very close to what the original 35mm prints looked, with warm skin tones and lush greenery. The Bluish hue of the previous HD version or DVD version(Same master as the Blu) is gone, thankfully! The framing hasn't been altered for 3D, which I believe should have been done, 'cause a lot of the frames and the positioning of the characters will look distracting in 3D.
from the looks of it they mastered the film at 2K from an already matted 1.85:1 print, hence there is no way that there will be a open-matte 1.78:1 print for the 3D Blu Ray this time, which is sad . But thankfully the frames are both wider and taller than the Blu Ray framing which as I felt, was zoom-boxed.
I honestly feel that if they could've done it, they should have gone back and re-rendered the original digital effects back onto the original plate photography, and created a taller 1.66:1 aspect ratio version for the IMAX release( like Apollo 13), especially since Jurassic Park was shot in Full aperture 1.33:1(or slightly taller) The 16:10 version would've looked great in 15/70mm IMAX theaters, and I would've more than likely paid to travel to another state her in India to watch it!
Here are some examples( some I found, some I recreated by combining several sources ) of the taller effects plate, which I believe was shot in Vistavision 1.66:1 giving it a 16:10 aspect-
Notice that the frame is taller than the final 1.85:1 cut(compare it with your dvd or bluray)
This is a frame that I reconstituted from two different sources, on from an interview of Dennis Muren, and the other from a HDTV source(which is both tall and wide than the Bluray)
3. Another CG plate shot, taller than the previous two-
Here are some non CG 35mm film stills which could easily be cropped to a 1.66:1 aspect ratio-