Here's another Denon AVR-4700H feature
When I turn off my Samsung TV with the Samsung remote, it automatically turns off the Denon 4700 too.
It must be a configuration in the HDMI settings of the Denon 4700 as it doesn't happen when I disconnect the HDMI cable between the TV and the receiver. I also notice the Auro-3D audio format has new settings for various room sizes on the 4700 that are not available on the 4500.