Prolost.com:

I never doubted that last year’s push of 3D televisions would fall on its face, but I do worry about consumers being tricked into thinking 4K matters, because they were with 1080p. Many friends ignored my advice to go for the crisp plasma blacks of the 720p Kuro and instead opted for a 1080p set, due to the same inability to shake the sense of more-is-always-more that drives consumers to buy increasingly high-megapixel point-and-shoot cameras.

The reason why doesn't matter. Will people buy them. And yes they will. America only wants bigger and sharper. Even if they have no idea what it means.