What are the actual differences between cheap and expensive smart TVs?

Nearly any TV is suitable for 4K content, but spending more gets you a better viewing experience and several other advantages.

Nearly any TV is suitable for 4K content, but spending more gets you a better viewing experience and several other advantages.<p><img src="https://www.engadget.com/img/gallery/what-are-the-actual-differences-between-cheap-and-expensive-smart-tvs/intro-1788462094.jpg" /></p>