Which VR technology first gained widespread adoption among architectural firms for client presentations between 2015-2017?

Virtual reality has transformed how architects present designs to clients and stakeholders. Before photorealistic VR walkthroughs became standard practice, architects relied on different methods to help clients visualize spaces. This poll tests your knowledge about the breakthrough technology that first allowed architects to offer immersive virtual reality experiences of unbuilt structures to their clients.

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Google Cardboard VR viewers paired with smartphones
Microsoft HoloLens mixed reality headsets
CAVE (Cave Automatic Virtual Environment) systems
Nintendo Virtual Boy adapted for architectural visualization