"The technology also promises to be more secure than ordinary Wi-Fi as the light is unable to travel through walls, meaning that connections are more secure and there is less interference between devices."

I don't understand how there could be "less interference" between devices.. Ok I get the transfer range, but how about particles in the air, birds, etc? Wouldn't packet loss be an issue here if something interrupts the stream? Unless you had multiple transmitters repeating the data...