Present day computer tech is more Sci-fi than that in TMIAHM's Luna..The creation of "Mike"'s Avatar in the book was a big,number crunching deal.going for conceps like VR in Minear's take would be bringing things to a futuristic level again..
Me,I can go back and re-read the book again and again.
The CG tech is here to make this movie now,the question is do we want the movie faithful to the original material,or tweaked to the point it's "based on" RAH's story..