May I suggest that you see Christopher Nolan's Inception as soon as humanly possible? It's a superbly-made picture that dazzles the mind as well as the eye. Don't forget to allow time for your mind to decompress and/or put itself back together after the viewing. The ideas may not seem quite as complex or brain-bending to science fiction fans as it will to unsuspecting mainstream audiences, because we've had years to assimilate the concept that reality is not all it's cracked up to be. Still, you'll want to be able to savor the experience and come to your own conclusions.
Nolan's dream logic, as expressed in the film, is not the same thing that you or I might imagine, and that rings true when talking about our dreams with other people. Dreams might share some similar concepts, but the details vary tremendously -- and wonderfully. So too with cinematic conceits that dare to question reality, whether by taking us into a dream world or by suggesting that we have no idea what we're talking about when it comes to reality. Does any of this make sense?
1. The Matrix
"Whoa!" Likely to be the most common basis of comparison to Inception, the superb action thrills mixed effectively with vaguely philosophical rambling and eye-opening visuals. It flies by at such an intense pace that it's over almost before it begins; I can still recall the smile on my face after a first viewing. At the same time, it's a vigorous wake-up call to sleepy, slothful humanity.