VR Olfactory & Gustatory

VR Oculus Rift Olfactory Display

https://hackaday.com/2017/03/21/your-vr-doesnt-stink-yet/

VR Gustatory Display (Unreal: this tastes delicious)

https://www.newscientist.com/article/2111371-face-electrodes-let-you-taste-and-chew-in-virtual-reality/