  Just recently, the concept of augmented and virtual reality (AR/VR) over
wireless has taken the entire 5G ecosystem by storm spurring an unprecedented
interest from both academia, industry and others. Yet, the success of an
immersive VR experience hinges on solving a plethora of grand challenges
cutting across multiple disciplines. This article underscores the importance of
VR technology as a disruptive use case of 5G (and beyond) harnessing the latest
development of storage/memory, fog/edge computing, computer vision, artificial
intelligence and others. In particular, the main requirements of wireless
interconnected VR are described followed by a selection of key enablers, then,
research avenues and their underlying grand challenges are presented.
Furthermore, we examine three VR case studies and provide numerical results
under various storage, computing and network configurations. Finally, this
article exposes the limitations of current networks and makes the case for more
theory, and innovations to spearhead VR for the masses.
