Use your mobile to pay. Links with more info.
http://www.theregister.co.uk/2010/12/09/visa_paywave/
http://thenextweb.com/uk/2011/02/04/o2-to-launch-wireless-payment-service-later-this-year/
http://www.electronista.com/articles/11/02/02/lg.to.bring.nfc.system.to.europe.in.2012/