Virtual Reality has often been associated with the head-mounted display (HMD). I'm much more interested in immersive projection-based displays, because they allow large screens and very high resolution, using Common-Off-The-Shelf (COTS) components to achieve a display resolution and brightness that was impossible a couple years ago at a pricepoint that is comparatively cheap. Combined with current generation high-powered graphics cards they form veritable display powerhouses that support highly interactive immersive display of extremely complex models in their full three-dimensional glory. However, they are not without problems. Many small components needs to be combined, be it graphics cards, LCD monitors or projectors. Because these COTS components were not designed for this application, they exhibit serious weaknesses in terms of realibility and consistency. But that's what makes it interesting.