When Should I be Looking Into Purchasing a 4K TV?

[Spade]

Disclaimer: Putting this in the gaming section, so more people see it. 

I'm interested in purchasing a 4K TV soon and I'm not sure when I should be buying it and which ones should I look into? I pretty much want a Samsung, or Sony tv as well. I've enclosed one of the models I'm looking into, possibly 55 or 60 inches. I currently sit about 7ft from my TV as well. Have any of you purchased a 4K TV? Any advice would be nice.

I'm thinking of the possibilities of the PS5 having 4K capabilities and watching ultra HD blu-rays with it. 

My budget is around 1000-1500 as well.

http://www.amazon.com/gp/product/B00Z0IBCD6?keywords=4k%20tv%20samsung&qid=1457798991&ref_=sr_1_1&sr=8-1