"Ultra high def" TVs may be mainstream next year TV makers have jumped through hoops trying to add new features to TVs in order to win customers who have been, until now, content with the big, cheap, low-on-features flat panels they find at price clubs and big boxes. Smart TV, 3-D TV, TVs with built-in cameras. These have all been tried. But the next innovation, called "ultra high definition" might be the innovation that will really catch on.