Sony at CES 2013: 4K OLED, Xperia Z, and the return of the Walkman

Sony's 2013 CES is a big one, with upgrades across all its product lines – and a few things we've never seen before. The company's known for having a huge presence at the annual Vegas convention, and it had plenty to show off at its orb of a booth inside the convention's Central Hall. Some things, like a 4K OLED TV prototype, are a long way from actually being a product you can buy; others, like the Xperia Z, are coming soon to a store near you. The company's primary focus is on TVs, as is typical at CES, but it's making changes across all its products. And hey, there's even a new Walkman!Check below for everything new from Sony at this year's CES.