Fovi3D (http://www.fovi3d.com/ http://www.fovi3d.com/) makes this kind of light-field display based on microlenses. One challenge here is the tradeoff between

Fovi3D (http://www.fovi3d.com/ http://www.fovi3d.com/) makes this kind of light-field display based on microlenses. One challenge here is the tradeoff between spatial and angular resolution. If you're generating a 4x4 lightfield starting with a 2160x1440 display, you only end up with 640x360 superpixels. The company I work for (https://www.leiainc.com/ https://www.leiainc.com/) makes a display that can switch between light field and 2D, so you can have the best of both worlds.