>>301024249
The HMD has some questionable design choices:

The clip on the left side of the HMD headstrap that holds the cable in place cannot support the stress placed on the cable under normal use and will break eventually. Additionally, that clip forces the cable into a crinkled position between it and the connector which introduces unnecessary wear on the cable. 

The lenses are dual layered, and not sealed around the edges. Body oil can seep in between them and cause the lenses to de-laminate. This is the reason for the silicon gasket around the edge of the lenses; however, as we all know, that gasket erodes quickly from the same oils it is supposed to protect against. 

>>301024881
Any big block of a solid color will compress well. That's an ideal situation for a compression algorithm since it can represent that large block of pixels with a very small amount of data.