The upscaling quality on 2015 and 2016 Sony Bravias has been good though never stellar, but the KD65ZD9 – featuring the Japanese maker’s new and improved X1 Extreme processor – is a totally different beast. According to our tests, the display boasts the best standard-def upconversion we’ve seen from a consumer-grade TV so far, outperforming even that delivered by the superb OPPO 103 Blu-ray player.
The previous generations of 4K TV have not done a satisfactory job of upscaling 1080P TV signals. I hope Sony Z9D and Panasonic 900H can do better.
I have also watched 1080P TV on a Panasonic 900H TV at the Panasonic store. Not very impressed, but it's hard to see the true potential of a TV at a store, since most of them have subpar TV signals and electrical power conditions.