Figured it out. The Sony 4k tv app for prime video and netflix were set to 4k as they were on the tv when I bought it. The prime video app and netflix app that came with my cable tv box were set to 1080P as that was what I had when I first got the cable box. Forgot to set it to 4k when I got the new Sony 4K tv. So it was a simple case of "operator error". D'oh!!!Where are the two versions listed? On Prime itself? I have a sinking feeling this is a VERSION difference. Just as we have a watered down Netflix we probably have a watered down Prime Video. I can stream with my cable box or the TV.