I see the TV manufacturers are starting to sell these now. Is there anything on the market that can utilize the extra resolution or is it just a sales gimmick?
Its a marketing gimmick. Totally worthless "technology." Its already been scientifically proven that the human eye cannot even discern the higher pixer count at 4k except for in EXTREME circumstances. From what i read you dont eevn get any benefit over 1080 unless you have a 72" screen and only sitting 10-15ft away.
Worthless just like 3D.
Boobies are much sharper in 4K.
Vivid is already doing demo porn in 4K.
Porn is always the early adopter in new viewing technology.
My understanding with 4K TV's is that you'll only see the difference when you're sitting 3 feet or less away. The good thing about 4K TV's is I HOPE it drives the price down of the current highend TV's. I saw the 84" Sony at Nebraska Furniture Mart and wasn't impressed for the $$$ you'd have to spend.
If I were to get a 4K TV right now, this one had decent reviews if you don't need all the fancy stuff: Amazon.com: Seiki Digital SE50UY04 50-Inch 4K UHD 120Hz LED HDTV: Electronics