it seems one should skip the 4K TV http://www.multicamhd.com.br/en/home/ http://www.extremetech.com/wp-content/uploads/2012/01/CES_2012_d_cardinal_008.jpg
they very rich or people who need the newest tech stuff might buy the 8k. i think you can buy a very good led lcd for $600 somewhere and if it does not have wifi put a google chromecast in it. the basic led lcd is amazing to what we had 10 or 15 years ago by far so it really comes down to what you want to spend your money on. if your questions is do i see a difference from 4k to 8k the answer is yes but at some point its all silly.
i prefer having them naked at home not on tv with some clothes but we all roll different haha. i am not a big tech person but i will have to look around and see a 8k screen now. i just saw 50 inches lcd led for under 500 with decent brand.