Here's why 4K is misleading: Companies love the "4K" buzzword since it sounds bigger and better than normal HD, and 2160p sounds like a bigger and more appealing number than 1080p.

Fabrizio Bensch/Reuters

If a 4K TV is four times larger than a typical HD TV, it should be four times better, right?

Of course, that's not the case.

This Carlton Bale article puts it into perspective: From about five feet away, you'd need something like an 84-inch TV to see the additional sharpness. With a more common 42- or 50-inch TV, you'd have to sit about two to three feet away. So, it's not going to happen, basically.