Walmart offers the LG 49" 4K 2160p WiFi LED-Backlit LCD Ultra HD Smart Television, model no. 49UB8200, for $549.99 with free shipping. That's tied with our mention from a week ago as the lowest total price we've seen. (It's also a current price low by $150.) It features a 3840x2160 native resolution (four times that of 1080p TVs), WiFi content streaming (Netflix, Youtube, Hulu Plus, more), three HDMI inputs, and USB.