HDMI with 4K Pass-Through for super high res images, AirPlay for music streaming, digital USB connection for iPod/iPhone/iPad, CINEMA DSP 3D for incredibly realistic sound, and ECO functions.
I haven't done much with this receiver yet... just enough to know that it works. I was impressed by the number of internet radio stations it had, but the user interface & OSD are a little primitive looking. Not super easy to use. But the physical characteristics of the device are great... I especially like the connectors for the speaker wire.