Walmart offers the Vizio SmartCast 50" 4K 2160p LED-Backlit LCD Ultra HD Smart Display, model no. E50x-E1, for $398 with free shipping. That's the lowest total price we could find by $199, although we saw it for $50 less the week of Black Friday. It features a native resolution of 3840x2160 (2160p), Smart TV apps, USB, V8 octa-core processor, and four HDMI inputs.