There is technology that can create three-dimensional images in space.

Notes:
Hologram-like special effects are frequently used in modern sci-fi movies. This theme should be used only if the holograms are explicitly discussed or are significant to the story.

Examples:
In pkded1x10 "Kill All Others", Philbert is rather put off when he finds his wife sharing the sofa with a hologram of a sexy foreign man selling coffee.

References:
https://en.wikipedia.org/wiki/Holography