You could do this from your bedroom to your bathroom or even for the toilet door and just have it slide over the shower entrance??? Closet door? Nice alternative to a pocket door. Much easier than moving electricity and tearing into a wall.
Genius! I've been dreading the thought of having to remove the giant mirrors that were plastered onto the bathroom walls, but I never realized I could just build out the frame on top of the mounted mirror! Absolutely brilliant! Going to Lowe's today!