>>34943
Like >>34947 said, in addition to being able to read anything, you need a beefy gpu to feed the goggles with frames fast enough so that you don't notice the jitter.
Jitter and lag will break the illusion and worse cause headaches and make you sea sick.
>>34950
They don't have enough juice to drive them with good VR @+60FPS.
>>34943
Also, just choosing a plastic without conductive or lossy additives deals with the attenuation. And inserting the antenna in the middle of it likely helps as there's less stuff changing in the nearfield and detuning it.
Using some metal plates (parts of the chassis) as antennas would mean transferring parts of the case to insulating materials to get the antennas to work. Designing multiband antennas for stuff like cellphones is really hard.