The Pederson bicycle uses small tubes strung together with cables to produce a suspension like effect.
This in combination with the hammock like saddle and super relaxed geometry makes them very comfortable to ride. I wonder if this type of frame could be updated with modern materials. Maybe titanium tubes and kevlar cables? The Ibis Bow Ti used titanium tubes that flexed instead of pivots and Topolino builds bicycle wheels with kevlar/carbon spokes.