Walmart offers the Panasonic CX400 Series 50" 4K 2160p WiFi LED-Backlit LCD Ultra HD Smart Television, model no. TC-50CX400U, for $499.99 with free shipping. That's tied with last week's mention and within $2 of the best outright price we've seen for any new 50" 4K Smart TV. (It's a current low by $129.) It features a 3840x2160 (2160p) native resolution, Smart TV apps (including Hulu Plus, Netflix, and YouTube), USB 3.0, and two HDMI inputs.

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