Programmable matter is exactly what it sounds like, and it's amazing, need a new cup? Push some buttons and a few seconds later, you have a cup, need a chair? Again, push some buttons and you have a chair. Need a city? Yes, a city. Press some buttons, and a city will appear right before your eyes, this is like a step up from 3D printing, instead of printing out the object you need, you just need a program, press a few keys, and it'll appear in a few seconds instead of a few hours, now, depending on how advanced it is, we could use it for rockets, nothing would fail, because the matter would just take a new shape to compensate, or even repair it extremely quickly, making rocket failures almost nonexistent, so what do you think of its potential?https://en.wikipedia.org/wiki/Programmable_matter