In terms of materials and technology, I'll try to make some educated guesses.
We already have self sharpening blades. We also have shape memory alloys, which remember the original, cold forged shape and return to it by heating. I expect the metalurgy will go even further, with self assembling metals, with the mollecules arranged in such manner so there will be no need for heat / cryo treatment. Those materials will be shaped using a 3D printing technology, similar with the way nowadays 3D printers let us make our own models from Nylon (like the
N12 printed bikinis).
All you'll need to do is go to the printing workshop with the CAD drawings and there is your dream knife come true.
It will be a wonderful time for designers and here, on the creativity turf is where the challenge begins. For my part, I'm waiting for the folder with a slider which selects: "manual / automatic / assisted / out the front / balisong" mode