No, I got that from reading Kubrik's own comments on the meaning of the film. I ignore speculations on what an artist means, it's a waste of time when I can just find out from the artist himself. (there's some interview of him online somewhere where he discussed this.)
The sound and effects are not perfect for today. They are perfect for the 60s. Even by the 80s I could see the effects were starting to look pretty dated.
Every time something takes me out of the experience of the movie, either it should have been edited out, or done better. In the case of 2001, it's an old movie. I am old, and I am a movie connoisseur.
I wanted to enjoy it with my family like I did when I was younger. But the effects look down right silly. And in a serious movie, you can't have silly looking effects. Compare how the movie gravity dealt with zero-G, it makes 2001 look like high school kids made it now.
The one thing that stood out, was there use of tablet computers, that was brilliant, and was done with rear projection, so it looked great even today. The rotating and curved floors are truly inspired work, but the music score is meaningless today, even to me, who grew up with classical music.
If the art of film making can't improve on something made in the 60s, then it couldn't have improved on something from the 30s, and we know neither is true. So, 2001 could be remade, just not by hollywood bozos.
The story is of a profound mystery, but it's not told from the perspective we have today of putting someone inside the mystery, it's told from an odd 3rd party perspective popular in older cinema. Compare how you felt in Interstellar and Gravity, __you__ were there. It was you who is in danger and in risk.
In 2001, the characters were in the mystery, and we were simply observers. Applying modern storying telling techniques (that Kubrik helped pioneer) would dramatically improve the enjoyability of the 2001 story for us today.
Edit: I wanted to add that the scene where he's rebooting/working on the computer (HAL), all he does is push in clear plastic blocks. That is just stupid. (He even just pushed them in IN ORDER, wth?) I work on computers, and he didn't even mildly pretend to do anything at all technical. I think this was pure laziness on the film makers part. They knew computers were complicated back then, and to make them seem so stupidly simple that you could find an error by looking and a sheet of clear plastic with no markings or anything? It fools kids and ignorant people, but anyone with any technical knowledge, it rips you out of the experience. Another reason to update it, or at least admit it is not as effective an experience as it once was. A classic doesn't mean it's good now, it means it was good at one time.