This sofa, called "DOC," is from ResourceFurniture in New York. It's a part of their "Space Savers" line of beds; most beds either transform into sofas, or disappear completely into the wall. This is perfect for someone looking to hide their own bed and maximize their space, or for someone without a lot of room but who still wants to be able to host overnight guests.
While we're on amazing transforming furniture, I have to share this astounding table:
It doesn't exactly look tiny or affordable, but it's still mesmerizing. More furniture makers should be encouraged to make their pieces adjustable or convertible; I know we TAA dwellers would appreciate the flexibility!