Anyone can slap a piece of ham in between some sliced bread and call it a sandwich. Similarly, anyone can slap an extra thing on something and call it a new invention. (Herb scissors, anyone?) However, real innovation occurs when one thinks differently, outside the box, and doesn't color within the lines -- or in this case, use standard commonly accepted sandwich-making guidelines such as two wholly separated slices of bread.
The Sandwich Knife is a two-bladed knife that slices bread twice as nice. More than just the sum of its parts (that being two knives), the Kickstarter campaign offers something that presliced bread from a bag can never offer: not quite sliced bread.
Instead of cutting all the way through, one of the blades is slightly offset from the other; as one cuts all the way through, the other stops just shy. The result is two slices of bread that have a nice little backing holding it together helping to keep contents within.
Not as encapsulating as a pita and not as plain as plain sliced white bread, the results from using the dual blade Sandwich Knife are open to interpretation. Perhaps an extra-saucy or otherwise overflowing sandwich is in your future. Yet, for now, you'll have to wait; assuming everything works out, the estimated delivery is October 2015. Until then, you'll just have to make your own.