Inception is an outstanding movie. In a time where we get nothing but films about a group of similar people shooting/killing/blowing up a group of similar bad guys it is very nice to see something a little different. This is an excellent and suspenseful action thriller that is both smart and moving. The visuals are awesome and the plot moves with just enough complication to keep you interested the whole way through.
It's a fascinating aspect of the plot that is the focus of this writing lesson. The technology that gets the characters into each others' dreams is never explained other than by one line of dialogue: "The military developed this so soldiers could train realistically and not actually hurt themselves." That's the extent of the technobabble. What I love about it is that the technology really is irrelevant when you think about it. The characters believe in it. They use it and it works and it follows a few rules and that's it. That's a smart way to write the script because it saves you all kinds of time and effort to come up with something plausible. While you might think that is important, I would submit that you are just opening yourself up to trouble when someone starts to pick apart your system. Much easier to just remain mum and let the rest of the story work in your favor.
Anyhow, go see Inception. You'll thank me for it later.