[tkk23]

>You would need a headset so small and light it's not too far off from a pair of sunglasses

Why? You don't have to transport VR. VR is the complement to mobile phones: mobile phones are used when you leave home, VR is used when you don't leave home.

The big question is: Are people going to leave home or are they going to stay home?

My guess is that it depends on how much energy is available. If there is no infrastructure worth visiting for billions of people, then VR will become a success.

>It needs to be inexpensive enough that everyone on Earth who currently has a smartphone can afford one.

If work happens in VR, then employer will finance the hardware for their employees.