I see that you have already been warned of the forum rules in this thread. We are a friendly bunch, and will help you if we can but repeatedly breaking the rules will not be tolerated. Try and watch your wording.
Someone from here suggested before that the images from NASA could be used as a background as they are very high resolution. Since you are going for a Sci-Fi theme, it might be worth a look. http://www.jpl.nasa.gov/spaceimages/
Or build a CP with the computer inside of it. When you feel like playing you get it out and hook it to any TV in the house. If / When you get around to building a cab, you can use the CP on your cab.