This would not make me worry. It is not the anisotropical etching what makes a semiconductor fab expensive. Some plastic jars and a simple photo equipment would do for watchmakers to reproduce parts. And if the technology will actually establish, some specialists may buy a photo plotter, and do such jobs for tiny money. I already used photo-lithography to reproduce complicated repeater parts, because I found it boring to saw and file them from scratch, and the equipment of my tiny electronics lab is by far no multi-million sink.Setting up the manufacturing fab is multi-bling-$ investment...
And it is another move away from watchmaking. What if it doesn't catch on? Let's say they make a thousand, when they need repair these will not be repairable.
Or if it is successful and lasts 50 years, what about repairing it in 150 years time?
You can cut shape and profile metal, you can't do this with silicon.
I really dislike silicon in watches.
dom_, very good points.Yes but every maker will have a different one, and when parts run out you won't be able to get a one off made.
Steel and brass however you can.