The rise of 4K home entertainment!
I love the idea of 4K a lot more than I ever did for 3D. I think it is the future, but still a few years off. A lot of tv shows are still shown in 720p so since the public is still not demanding 1080i, why would the suppliers break their neck (for cheap) to get you 4K?
My prediction: 5 years until it's popular. 10 years until 4K is the standard, maybe more. I've seen a side to side comparison...and it's really not as dramatic and compelling as it sounds.
To add further insult to injury, telling the general population that their HD tv isn't good enough is a tough argument, especially when most are less than 10 years into their purchase.
The demand for 4K globally has skyrocketed over the past year reaching the millions in China who is currently pioneering the 4K movement. If 4K is successful in the Chinese market come the end of this year then its very possible the battle of 4K could be seen as early as 2014...it will be an ugly one though that's for sure.
Until infrastructure evolves, there will be no commonplace 4K. It is a huge financial cost to upgrade these things :)