4K TV faces a long road to the mainstream (video)  LAS VEGAS—The
HDTV revolution was the greatest thing that ever happened to the
TV-making industry. Almost everybody finally had a reason to buy
a new set, and sales skyrocketed. But once that transition
period was over, sales began to drop, and the industry has been
looking for a replacement ever since.  HDTV was the first major
change in television tech since color TV in the 1960s. Getting
everyone to replace their fancy flat-screen HDTVs again after
just a few years has always seemed to me like a sucker’s bet.
But if you’re a TV manufacturer, you’ve got to do something to
keep the action! So a few years ago, CES was The One With All
The 3D TVs. And very few consumers—the people who literally put
the C in CES—cared.  There are still 3D sets at CES, but 3D has
simply become irrelevant. The TV makers have moved on to the
next new technology that they hope will spur a resurgence in TV
sales.  This one’s called Ultra HD, or 4K, and it threatens to
make your HDTV