Unless you're talking about TVs from brands you've never heard of, the TVs on offer at Walmart are often the exact same models you'll find at Best Buy and other big tech retailers. Brands often have contracts with multiple retailers to maximize their chances of selling well as well as to increase their market share. If you've got your eye on a fancy LG or Sony OLED TV or a big-screen Samsung, the one for sale at Walmart will be identical to the one you buy directly from the brand or at another, tech-focused retailer. The only real differences you'll notice will be in the buying process itself as well as return policies and customer service quality.