the reviews clearly indicates that this 4K theatrical version isn't worth it. I guess it would be for the prop hunters.

1star reviewer said - "The movie is awesome but the 4K version leaves a lot to be desired... Where do I start? First off, the 4K version is ONLY the theatrical cut and DOES NOT have 3 versions of the film. Second, The transfer is garbage.. absolute garbage! DNR makes Arnold look waxy and gives the motion a “smeary” quality where it’s used. There is NO EXCUSE for this with 4K and this is by far the worst looking 4K transfer. There are moments where this does shine but the DNR usage totally takes you out of the movie. The second Blu-Ray release (the one that came out after the Skynet edition) is better over all because it was remastered without DNR. If it’s true that James Cameron approved the 4K remastering, he’s clearly lost his mind!"