While the Seax blade is new for Emerson, as Ernie points out, it is not a new concept, having been used back in Viking times. Ernie has been a fan of Viking weapons and tools for many years, and this prompted him to pay homage to this blade design, which was originally used by Vikings in a fixed blade configuration.
The Ontario RTAK II field knife is a beast. Use it for chopping, sharpening, or like a machete or hatchet. It could also be a respectable defense weapon. It will give you shelter, fire, and protection and it makes a nice addition to the bugout bag.
The Emerson Roadhouse is a badass tactical folding knife that performs utility duties and effectivly functions as a defensive weapon if needed.