Li-Fi is the next upgrade to wi-fi
Researchers says, the new alternative technology transmits high-speed data using visible light communication, which would reach speeds of 1 Gbps, which is about 100 times faster than a standard WiFi.
As Li-Fi is based on light, it cannot go through walls and would have a more limited range than Wi-Fi which also means greater security.
There are currently tests going on of the technology where they have some pilot projects running on.
news source:-interesting engineering