CES unveils big TVs with 'ultrahigh definition'

LAS VEGAS (AP) — The race to make TVs larger and larger has created a colossal problem for manufacturers: As screens grow, picture quality worsens — unless the viewer moves further away from the screen.

The issue is playing out in cozy dens and family rooms around the world. To get the full benefit of a large high definition screen, viewers must move back from their sets. Since the ideal viewing distance is no closer than three times the height of your screen, or about one and a half times the diagonal length, big TVs have literally forced many families' backs against the wall.