Here is the list of VR or virtual reality events, expo, exhibitions or conferences in 2014. Some are fully dedicated to virtual reality and some can be related with VR. For virtual reality events in 2015, you can get it here.
Next year, there will be an event in conjunction with the IEEE VR 2015 which is IEEE 3DUI 2015. Its full name is “IEEE 10th Symposium on 3D User Interfaces” and this two days event will be held from 23rd to 24th March 2015 in Arles, France.