Probably because the refresh rate is 60hz, meaning 60 times per second, vs. 120 or even 240 for higher end TVs. I just bought a Samsung 4k TV with a 240 refresh rate, but it was also 4X the cost for the same size. So, for our rec room, I'm taking a chance on this TV. I'm not a gamer, and I suspect it's with video games you'd actually notice a real difference. But I do expect a slight difference i.e. maybe a little bit of motion blur with fast-paced sports and movie action scenes. But for this price and based on current reviews, I think it's worth a shot. Just know what to expect.