Is there a major difference in picture?
While the pictures are certainly sharper with 4K, you might not see as much of a difference between 1080p and 4K, as compared to upgrading from old CRTs to flatscreen.
When consumers traded in their 480 for a 1080 TV set, most likely the increase in size of TV went up a great deal as well. This time, consumers are typically sticking with the same size TV, just with a much sharper image. The majority of TV models range between 40 to 70 inches.
A difference in resolution will only be noticed on a 4K set if you’re either sitting close up, or are watching 4K content.
Sitting up close won’t break down the image.
One of the most impressive aspects of 4K TV sets is that it doesn’t matter how close you are to the set - the image will not deteriorate, nor will the eye be able to make out the individual pixels.