2015 Technology:
I know the 2015 has a touch screen and the Genesis App (search youtube for demo).
I think the Siri interface is new and possibly Google search for POI's and addresses.
Google search is activated from a button on the rear view mirror.
Not sure if the following features are new:
My Lexicon sound system synthesizes surround sound from stereo.
I can store music (MP3) on the car's memory, but only one song at a time from thumb drive. I haven't tried to store songs from CDs.
You can watch many reviews on YouTube, search 2015 Genesis sedan. These videos will feature new suspension,
wheel base and drive modes.
The puddle lights on the exterior mirrors may be new, too. When I approach the vehicle at night, the mirrors fold out and a light projects the Genesis wing logo on the ground.