The defense display science and technology (S&T) program must address problems facing warfighters that the commercial world will not. These problems require the creation of revolutionary display materials and devices, and the invention of visual system technologies. Breakthroughs needed in display technology for defense and security personnel may be organized into the following technical challenge areas: ultraresolution 25 megapixel devices and 300 megapixel systems (wall display systems at monitor pixel density), flexible plastic rollup displays (ultra-compact form factor when not in use), sparse data true-3D monitors (phosphors embedded in special polymer host matrices), virtual image and head mounted systems, wireless wearable video displays with ultra low weight and volume (including batteries), and intelligent displays with embedded chips providing integrated computing and communications functionalities. Organic photonics and electronics are central to the progress in these S&T challenge areas: significant materials progress is required to enable the display device capabilities required. These challenges and the results of a Department of Defense (DoD) Special Technology Area Review (STAR) on Displays are reviewed. A top-level roadmap is provided to summarize the defense and security S&T strategy.