What "value" do we get from using LiFi? You will have to invest in a new Light Bulb, rewiring so that these LiFi are connected. And hoping your phone or devices actually supports it. And years, years away from possibly getting the infrastructure and devices widely available.

Compared to WiFi, we are finally seeing 802.11ac 2x2 866Mbps on phones and Tablet, 1.3Gbps on iMac. 802.11ax coming in 2017, that will offer 4x real world improvement. We are talking over 1 Gbps real world throughput on Smartphone. Line of Sight 60Ghz 10Gbps+ WiFi are in the work.

So LiFi is like a solution looking for problem.