TV manufacturers Sony, LG and Samsung will focus mainly on OLED and Ultra HD and state that 3D technology is no reason for consumers to purchase a new TV. The manufacturers warn that this doesn’t mean that 3D isn’t important but that it had its peak time.
via MyCE.com.
Lack of 4K content is going to be a similar problem to what happened for 3D. TV manufacturers would love to sell you a 4K TV as the earnings on 4K are likely to be much greater, for the foreseeable future. This is mostly about positioning products to earn greater profits.