iPad 3 'to launch on 7 March'

Apple will launch the third version of the iPad on Wednesday 7 March at an event in San Francisco, according to a number of reports online. The reports also that the device will have a "retina" screen – with four times as many pixels as the current model – and could include 4G connectivity for US high-speed networks.The website iMore says the device will have a quad-core processor – compared with