Transparent screens doesn’t make much sense for consumer TVs (I know the article indeed points to other use-cases). You still need a black background to facilitate display of black content.
[W]ho wants to see their bookshelves showing through in the background while they’re watching Dune? That’s why the transparent OLED TV LG demonstrated at CES 2024 included a “contrast layer”—basically, a black cloth—that unrolls and covers the back of the display on demand.