I was looking at pictures of home theater system and I noticed a person had a cover like object over his TV that could automatically slide apart to reveal the TV. It was split in two at the middle with a vertical split. What are these things called? And where can I find them? Or are the custom?

Drapes? Doors? Shutters?

J/K, mask is probably the closest to an industry term. There are dust covers for sale on Amazon or such. But this sounds custom. Could try searching the DIY forum at AVS for mask or similar terms to see what others have done.