Terminator Genisys comparison shots. OK. I have to admit AMZN is not looking bad here. BUT. Ultraflix still looks better and for the same price or more I'd definitely go for the 4K on a 4K TV.
AMZN $4.99 2k HD
UF $4.99 4k UHD

https://flic.kr/s/aHskoavneg

And for some of you newer guys, here's some other comparison shots.

https://flic.kr/s/aHskgCziHW
https://flic.kr/s/aHskeCTrjF
https://flic.kr/s/aHskfT3Kmy
https://flic.kr/s/aHskgcCxxZ
https://flic.kr/s/aHskjsgz5C
https://flic.kr/s/aHskjKh5Va