Recently scientists were able to reduce the age of optical nerve cells in mice to a point where they could start replicating again, a trait that is usually lost a few days after birth. This allowed a blind mouse to see again. In the short term, this technology could be used to heal nerve cells, allowing paralyzed people to walk again and in the longer term stopping or even reversing aging.
Honestly, I think augmented reality. Virtual reality gets all the love and attention. It is great for entertainment, and in some business applications. Showing a concept, or allowing someone to check something out remotely. All the big things that will really change stuff.
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