To be pedantic, VR is not a device, "Virtual reality (VR) is an interactive computer-generated experience taking place within a simulated environment, that incorporates auditory, visual, haptic, and other types of sensory feedback. "
There are devices used to provide virtual reality, but it is not a device itself.
Now, if you're talking about the Rift Hardware then yes, it's input devices and output devices.
In general, I'd say almost all if not all computing peripherals that do anything even remotely interesting can be considered as input/output devices (I/O). Even extremely basic devices generally accept some form of input and produce some sort of output.
