Ultra high definition TVs are set to be the talk of International CES, the gadget show kicking off this week, but they aren't likely to account for much of the market even four years down the road.

That is the conclusion of analysts of the show's host, a day before TV makers such as Samsung, LG and Sony attempt to wow conference attendees with their latest models.

Ultra-HD TVs, with four times as many pixels as HD TVs, are expected to account for only 1.4 million units sold in the U.S. in 2016, or about 5 percent of the entire market. Sales in the rest of the world are expected to be smaller.

The analysts blamed high prices and low availability for the slow start.