Models are increasingly being built on the computer in 3D. Nevertheless, they will find that something is missing. You can see and manipulate the model in X, Y, and Z axes on the computer screen through fictional worlds, but the model remains 2D. Only something to completely overlook and miss details and nothing to grab or take with. Pick up and feel the model and remember the dimensions in your hand, experiencing the materials in form and color. Thats something that you can't make with a computer screen.