CES 2017 - AMD's unannounced Radeon RX 500 series graphics cards have made a surprise appearance here at CES, with Lenovo unveiling their new Y520 laptop that can be optioned with NVIDIA's GeForce GTX 1050, GTX 1050 Ti... or the Radeon RX 560M with up to 4GB of RAM.
It was most likely a mistake on Lenovo's part - because none of these graphics cards have been unveiled yet, but we should expect the Radeon RX 500 series part in question - with the Radeon RX 560M in question, possibly being a rebranded RX 460M as VideoCardz calls it.
AMD could use a new Polaris 12 GPU as well, but I'm taking away from this is that it's a lower-end SKU that won't be a Vega part. This means the RX 500 series should include a larger stack of cards, leaving the Vega cards to be branded as just that - Radeon Vega, like the Radeon R9 Fury line of cards from 2015.