List of emerging technologies

This is a list of emerging technologies, in-development technical innovations with significant potential in their applications. The criteria for this list is that the technology must:

1. Exist in some way; purely hypothetical technologies cannot be considered emerging and should be covered in the list of hypothetical technologies instead. However, technologies being actively researched and prototyped are acceptable.
2. Have a Wikipedia article or adjacent citation covering them.
3. Not be widely used yet. Mainstream or extensively commercialized technologies can no longer be considered emerging.