Changes

Ivan Sutherland and Bob Sproull created "[[A Head-Mounted Three-Dimensional Display]]", an HMD that was held by a mechanical arm mounted on a ceiling. The gadget was connected to a computer and displayed simple wireframe graphics to the user. The arm tracked the user’s head movements but was difficult to use. The contraption was also too heavy and bulky for comfortable use.<ref name=”1”></ref><ref name=”4”></ref><ref name=”6”></ref>

Ivan Sutherland and Bob Sproull created "[[A Head-Mounted Three-Dimensional Display]]", an HMD that was held by a mechanical arm mounted on a ceiling. The gadget was connected to a computer and displayed simple wireframe graphics to the user. The arm tracked the user’s head movements but was difficult to use. The contraption was also too heavy and bulky for comfortable use.<ref name=”1”></ref><ref name=”4”></ref><ref name=”6”></ref>

Ivan Sutherland also shared the concept of the “Ultimate Display”. This gadget could simulate the natural world so realistically that a user could not tell the difference between actual reality and virtual reality. The concept comprised of a virtual world viewed through an HMD and had augmented 3D sound and tactile feedback; computer hardware that created the virtual environment and maintained it in real time; and interactivity between users and objects from the VR world in a realistic way. Sutherland suggested that the gadget would serve as a “windows into a virtual world”, and his idea would become a core blueprint for the concepts that encompassed VR as of 2015.<ref name=”1”></ref><ref name=”2”></ref><ref name=”6”></ref>

Ivan Sutherland also shared the concept of the “Ultimate Display”. This gadget could simulate the natural world so realistically that a user could not tell the difference between actual reality and virtual reality. The concept comprised of a virtual world viewed through an HMD and had augmented 3D sound and tactile feedback; computer hardware that created the virtual environment and maintained it in real time; and interactivity between users and objects from the VR world in a realistic way. Sutherland suggested that the gadget would serve as a “windows into a virtual world”, and his idea would become a core blueprint for the concepts that encompassed the field of virtual reality.<ref name=”1”></ref><ref name=”2”></ref><ref name=”6”></ref>

===LEEP era===

===LEEP era===