I am doing some "virtual cabinet" stuff any I'm playing around with the idea of adding in a bezel similar to what you are doing with the horz_screen_bezel.png and horz_screen_mask.png.
You wouldn't happen to have a high resolution version of the Horz/Vert files would ya? I'm messing with a 4k TV, so trying to get my artwork as high-res as possible.
But, I'm thinking I like the way yours fades to black on the outside. It seems like it blends better with the bezels than a greyish monitor bezel (like the above post).
At any rate, nice work! Hopefully you can work on some official stuff.