Same or better viewing angles when compared to the HTC One.
I've seen the screen in real life, it really does have to be seen to appreciate how amazing it is. So far ahead of every other phone or tablet, if review sites complain about this one, then I really don't know what they want other than some kind of stupid marketing term like "Retina" or "S-LCD3".
From what I know the screen for i1 is better, higher contrast ratio and slightly wider viewing angles. The screen I saw on the prototype blew me away, and the guy who showed me said it was the final prototype before mass production, so they should be using the same quality panel (two I think, AUO-AHVA-IPS and JDI-AH-IPS). I don't know the exact specs, but I think it is around 1900:1 CR (the same as what is going into the next iPhone supposedly) 90% CR up to 160 degrees off angle and super low response times and low input lag.
As for the Tab Z II, might be late November, just a refresh though, won't bring any new features, just APQ8074 and Android 4.3 out of the box, possibly using the same panel type as the Ultra and i1. Tab Z will go down to $399/£329 to compete with the iPad 2 price point.