Welding helmets are bulky, VR headsets are similar. Lets parts in a helmet but the helmet needs to protect your face and neck from sunburn and potentially bits

Welding helmets are bulky, VR headsets are similar. Lets parts in a helmet but the helmet needs to protect your face and neck from sunburn and potentially bits of metal (depending on your position). And any processing bulk could be belt worn or even sitting on the ground connected by a cable: you're already tethered to the welder and buffer gas tank after all!