Difference Hue emulation and Hue binding?

Alexa pretty much is used for automating turning Pandora on and off. I use zwave motion sensors and rules for time of day, presence detection and ambient light (outside) to control lighting and such.
That and I have tasker running on my phone and sending mqtt to OpenHAB when the phone rings, Alexa goes 'Andy, the phone is ringing ’

Here is a link to the brand new Alexa app