Sony announced the Sony QX Lens last night at IFA 2013 in Berlin. The Sony QX lens are smartphone attachable lens-style cameras. It is compatible with most iOS and Android devices as long as it is able to install the PlayMemories Mobile app.
There are 2 models right now, the DSC-QX10 (Price: US$250, Sensor: 1/2.3, Pixels: 18.2) and DSC-QX100 (Price: US$500, Sensor: 1, Pixels: 20.2). Both models will be available end of this month in the US and October 2013 in Singapore.