Although the Sony Ultra HD Media Player has issues with 4K from non-Sony brands like Vizio, the Media Player works well over the new HDMI 2.0 with HDCP 2.2 to Sony's own Bravia 4K Ultra HD Smart LED TV with Android.
If you have a Sony 4K TV, this is currently one of the only ways to get the best 4K quality picture resolution without the compression effects that you get from streaming services like NetFlix.