[Quoth]

Holographic video and screens with no surface are basically impossible:
1) Real Holographic needs too much data and only still image capture possible.
2) You can project direct to the retina for AR/VR, but an image "hanging" in the air as per the first Starwars film in 1978 (I think) isn't possible. There are true 3D displays which use an angled rotating ground glass screen. The rotational speed sets the Z-axis resolution and the most visible frame rate. It's not holographic and not as realistic as a 2D view, though really 3D. You can project 2D and poor 3D images on a mist or fog. There is even a "rain" mono (B or W, really not even greys!) display using light and falling droplets, but it's continually scrolling to the ground as the droplets fall.

A 2D "pull out" display using LED, OLED (which are not real LEDs) or eink with some sort of scissors/pantograph or telescopic rear support locking at a number of distances is possible today, as in Earth Final Conflict (actually demoed in about 2006 or 2007 on eink). Unfortunately the drum size for the panel to wind off is too big still. An entire panel with reasonable life that bends as sharp as the Samsung one doesn't exist yet.

So called "holographic" narrator in War of the Worlds (Jeff Wayne) and recent Abba concert and similar are just 2D CGI.