Many corporate shows seem to be using fabric backdrops with 3-D shapes, with internal lighting. These shapes are also used on show floors as well. While Rosebrand offers some basic shapes and columns, the following three companies are my go to resource when looking for 3D fabric structures.
Pink Inc has flat walls, curves, ripple walls, arches, tunnels, and shapes as well as a few costumes!
Transformit has many of the same products, though they are a little more organic. They can also custom build a piece to your specifications & print on the fabric.
Moss Inc also has a wide variety of shapes, signage and event outdoor tents available.
While many of these things can be built in a shop (either as hard scenery or with frames and fabric) since these places have stock pieces, the engineering and technical development can provide an economic edge to building it yourself.