Hologram phone calls - sci-fi or serious possibility?

BBC News 

High-speed 5G networks could lead to big changes in how we use our mobile phones, allowing us to enjoy virtual reality on-the-go, interactive live broadcasts, and even project holograms from our handsets. But will connection "not-spots" and high costs stop many of us reaping the benefits? Holograms have always felt like science fiction - think of the scene in Star Wars when robot R2-D2 beams a 3D hologram message from Princess Leia into thin air. But imagine if you could project Leia from your mobile phone or tablet, anytime, anywhere. Richard Foggie, an expert at the Knowledge Transfer Network, says this could well be possible within the next five years thanks to the arrival of 5G mobile broadband networks.