Have you noticed that everything is via USB now?  I have the usb broadband kit, there is the USB Biometric Scanner and have you seen the latest these heating devices that you can heat your cups with can be done via usb too?  People cannot live without their computers these days that is why more and more devices are being thought of that can be done via usb.  You can even charge your game consoles and cellphones via usb.  It used to be people cannot live without their cellphones. Now it has evolved into their laptops.  They can leave their cellphones at home but never their laptops and their usb gadgets.