Yes... and no.
A transparent display is easy - we already have several companies marketing Organic Light Emitting Diode displays "OLED." These are carbon-based
transistor compounds that can, literally, be printed onto various substrates.
The unfortunate side of things is that these displays are very sensitive to UV exposure, and will be destroyed by sunlight. They also break down
under the forces of their own emission process, and will fade over time - with blue fading much faster than lower wavelengths like red.
Quantum Dot is the penultimate in display technologies, and will eventually replace OLED (as it is, essentially, OLED imbued with special crystalline
structures that remove virtually every drawback to OLED).
But it's still having some of the kinks worked out - as illustrated by that article.
The real problem with a transparent device is, interestingly enough, not the display - but the electronics within them. Currently, your phones and
portable devices (even your stationary ones) operate on wafers of specially doped silicon and metal oxides semiconductors networked together by metal
(usually copper) electrical conduits.
Currently, a number of researchers are developing both thermally and electrically conductive plastics - so that takes care of our circuitry and
heat-sinks... but transparent semiconductors (that can rival the efficiency of MOS technology) are a little more difficult to develop.
But I did manage to find this:
The scientists created films of fluorine-doped TiO2 by sputtering with an inert gas containing trace amounts of a fluorine precursor. The fluorine
insertion led to at least a 40X increase in the conductivity of stoichiometric TiO2 and a 3X increase in the rectification factor of TiO2 on p-type
silicon. These effects greatly increase the utility of the material for charge transport / transfer applications in displays, photovoltaics,
photocatalysts, catalysts, and chemical sensors.
In theory, I suppose a number of the existing technologies could be developed to create entirely transparent 'chips' that could be embedded into
You would just have a 'solid' block of plastic that had, inside of it, many different types of plastics and several transparent MOS technologies
that do everything from processing to display.
Honestly... I don't see how it would be a large advantage in the portable device market. I would, however, love to have this stuff embedded into my
car's windshield. I want a HUD, damnit... The possible applications to stuff like that is almost endless.