Laser-based illumination sources for projection systems are becoming a powerful alternative to conventional lamp-based light sources. The laser-based lights have a multitude of advantages over conventional lights, including brightness, longevity, scalability and others. The work described here looks at these advantages from a point of view of large-screen projection systems as used for immersive Virtual Reality systems. For these applications laser-based light sources are very useful, especially when using Infitec-base stereo glasses.