I liked the plot, and there were no big plot holes that I noticed while watching it. I can tell you that I didn’t really notice the 3D effects (I’ve watched other 3D movies where the effect is notable), so I’m not sure if paying extra for watching the 3D version is worth it. I might notice how big the differences are if I watch the “2D version” later.
To sum it up: The guy who made “The Grid”, Kevin Flynn, this computer generated world, got trapped by the program, Clu, that he had created to be like a copy of himself. This was because he had given it instructions to create a perfect world in there, but when he discovered these programs called “isomorphic algorithms” (or “isomors”), everything else became unimportant – including the program that was made to be a copy of himself. This was around 20 years ago in the movie’s timeline.
The son of Kevin Flynn, Sam Flynn (who now has grown up without his father), are told by his father’s old friend that he was paged from his dad’s old office in a gaming arcade hall. Sam goes over there and then also ends up inside this virtual world himself.
He gets thrown into these light cycle and disc war games, and after a little while Quorra (who is an isomor) gets him out of there and to his (real) father (Sam first thought that Clu, who was made to be a copy of his father, was his father). At first his father, Kevin Flynn, wants to do nothing in order to prevent Clu from getting out to the real world (he really dislikes imperfection) since Clu don’t know where Kevin Flynn is and needs his “identity disc” to get to the real world. Sam disagree, and then leaves to try to get out and to delete Clu from the outside. After this, Kevin Flynn and Quorra also decides to try to get out, and they try to find Sam.
If you want to know more, read a longer review or watch the movie.
I noted a couple of geek references, such as that the computer that was running this virtual world was running “SolarOS”, very likely a reference to Sun’s Solaris operating system. There were several other references like these.
Most of the other people who also watched the movie seemed to not have been as geeky as me but still seemed to like it, so I dare to say that you are going to like it if you find my short review interesting.