PlayMemories Camera Apps is initially supported by the new NEX-5R interchangeable lens compact system camera.

ENGADGET: Sony announces PlayMemories camera apps, will arrive on the NEX-5R first

Panasonic, which introduced the market's first mirrorless compact system camera four years ago, said it took lessons it learned then to the U.S. to sell its Lumix cameras.

WSJ: Camera Makers Enter New Mirrorless Arena for Serious Photographers