I guess this is the APC - Automated Passport Control kiosks:
http://www.cbp.gov/travel/us-citizens/apc
These kiosks take the basic questions and answers that was on the old form, plus the biometric control, and then the agent just asks a few questions.
Some airports separate the APC kiosks into separate banks, for US+Canadian in one area, VWP (Visa Waiver) in another. As far as I know they all do the necessary, and the separation is done purely to assist with line management between the kiosks and the queues for the agents. PHL I thought had them all in one area, but they do move them around (e.g. MIA has played out various strategies here)