Another company, Bolt Threads [1] just raised significant money [2] to produce spider silk as well. Started by a few molecular biologists, they too took it from a protein sequence, into yeast, purified the protein in bulk, spun it into thread, then wove it into a fabric. Which means, theoretically they can tweak the protein sequence to produce an entirely new fabric in a matter of a few weeks. Once you get a woven protein scaffold into a fabric, systematically modifying the scaffold further is relatively easy for a protein compared with the sugars and polymers we use currently.

It's hard to see unless you look closely, but this is the beginning of biological nanotechnology. These are some of the very first deliberately designed biological molecules to make it into a non-pharmaceutical market. Technologically, the silks in these fabrics are made of designed components an order of magnitude smaller than Intel's best transistors. And (under biological conditions) are significantly more functionally versatile.

[1] https://boltthreads.com/ [2] http://techcrunch.com/2015/06/04/spiderpants/