So basically, Star Trek vs. Star Wars. Okay, we all know which is better. Star Wars is better. I mean, come on. But believe me, I'm still a Trekkie. Don't worry.
Even though Star Wars is better, and even though scientists are indeed working on developing a lightsaber-like thingy, George Lucas created the story because he knew it would be awesome, and because he wanted to make a Western but there were so many out at the time (A New Hope came out in 1977) that he basically made a Western in space. He created his own science to make it real in the story. Gene Roddenberry, on the other hand, wanted his space story to be scientifically possible, even if not for many years. Nate has already enlightened us to the physics of tractor beams. I would like to shed light on a different part of the ships: steering.
The Millennium Falcon is one of the coolest ships ever. Lucas created the iconic shape while enjoying a hamburger, so I suppose that is where it got it's shape. Then he added the forward cannons to distinguish the front from the back. But how does it do all it's sideways flying and flips and turns? Answer: Star Wars. If we look at the USS Enterprise, on the other hand, it carries our similar maneuvers, but there is an explanation. It has thrusters all over it's body, making it possible for it to turn or even just stabilize. Answer: science.
Star Wars is superb. Star Trek is science.