Much like the members of Rage Against the Machine, it's a big deal when Pantech's concept phones make an appearance in public together. Unlike the members of Rage, however, these phones don't want to stab Zack in the face. The Pantech people tell me that it's rare that all the concepts are gathered up in one place, let alone shown off to the public, So this is a treat.
As for the phones themselves, they're all pretty out there. Each one uses unique manufacturing techniques, textures, form factors and designs that won't make it to market in its current shape. It's more like the automotive industry, where designs are tested out and integrated into the somewhat mundane products that actually make it to market.