1. Bio-Machanic technology.
2.The people who lost hand can have a new hand. The  machanic hand can do what a real hand can. The people who born without hand can have a machanic hand and do like what other can do.
3. You can not feel what you touch, and it can have problem with the chip control inside. The control chip can be overdude.
4. People may cut of their hand for the machanic hand. But it can help the people who lost therir hand in battle or born without it. This will help other be confidence and can work like other.