Using comparison function on the web site I see the following additions/changes:
- Dialog lift with no presence speakers required
- Dialog level adjustment
- Audio delay of up to 500ms (instead of 250ms)
- High-resolution music enhancer
- 4K pass-through & 4K upscaling
- HDMI zone output
- AirPlay
- ECO mode
I also notice the following omissions:
- Dock port
- Pandora, Rhapsody, SIRIUS Internet Radio and Napster
- Front S-Video
- SIRIUS Satellite connector
- Second remote
- Zone 4 optical
I suspect that the omission of the Internet music services like Pandora is just an error in the specs.
The biggest change seems to be the assignable HDMI zone output and AirPlay. I was expecting that there might be a signifcant redesign to the back panel, maybe dropping S-Video, but it's the same basic layout they've been using for the previous two model years as well.