At first this sounds cool but I'm not sure I understand any benefits of using visible light over the non visible light we use right now. It seems this just shifts data to an inferior spectrum space for a gimmick.
Could you imagine having to ask someone to move over a foot because their shadow is killing your internet speeds?
Yes, that's still the major problem and there is a long way to go.
But in general, having Wifi that's 100x faster is the biggest benefit.
We'll see where this technology may take us in the future!