Technology with out screens

estimated to come in 2020

How do screen less displays work and why do we need them?

Screen less displays may be displayed right on your retina. Screen less displays will make it so you do not need to clean your screen and it will diminish the amount of tech you will need to carry.
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Who is creating screen less displays and what are they

MIT's tech lab has created a prototype screen less display. A screen less display is a piece of technology like a hologram.