The TV industry is hurting, they long for the glory days when everyone wanted to trade their old 20" SD CRT TV for a fancy new 43" HD LCD. Those were great times for the TV industry. Unfortunately for them, HD TVs have hit saturation, and there just isn't the desire for everyone to go out and replace their perfectly good HD TV with whatever today's gimmick is. We've seen 3D TVs, 4 colour pixels, Curved screens, apps, apps, and more apps, and now 4K. Nobody is rushing out to replace their TV for any of these. Sure 4K will eventually catch on, but much slower than HD did because for most people they can't tell the difference unless they can see it side by side with HD at the same time, and even then, it's only marginally better (if at all) at normal viewing distances and screen sizes.
There will likely be a new fad next year too as TV manufacturers try, yet again, to re-capture the glory days of the SD-HD shift. But those days are gone, and I don't anticipate them returning for another generation.