My Favorite House of 2015: Peachtree Heights East for the Win.
Fabulous solution when space is too tight for a standard hinged door. You can also put furniture on the walls next to this opening, just leaving enough space behind the furniture for the doors to slide.
One day this will be in my house...
Archer hardware on a mirror sliding door http://rusticahardware.com/archer-barn-door-hardware/