"...presentation included a demonstration of the use of a malicious NFC device which, simply when placed close enough to a user's phone, resulted in a complete compromise of the phone, or what security people call "remote code execution."
Extra links about NFC and enabled devices, which add more emphasis about the possibility of an NFC attack:
Near Field Communications
Windows Mobile 8 going NFC
Orange UK went NFC in 2011
France Telecom - Orange mobiles that are NFC enabled
GSMA - Mobile NFC
According to the GSMA, "Mobile Network Operators(MNO) across the world are now rolling out NFC-based services, fuelling the next wave of mobile innovation. Commercial services are live in France, Japan, South Korea, Tanzania, Turkey and the UK."