Have you seen it?
Many have. Mark Henninger did; 18 hours ago. Read his post back aways in this thread. And it sounds damn impressive for an LCD. He saw compromises at 85 degrees, no where near your 10-20. Your statement sounded as if you'd seen it in person.
It's pretty common to notice the barest minimum of adverse effects at roughly 20°. I don't think I've ever seen an LCD so bad that 10° showed anything. 10° is standing 10 feet back and while staring at the same small section of the screen, moving laterally about 20 inches. I don't doubt it, but that's pretty bad if that's what you've seen.
He actually states elsewhere that among the very few things you can ascertain is viewing angle for most of the TVs (I think he was talking about the Toshibas). You can't get close to them on the floor, but walking side to side is possible.
I totally agree though: I'd really like to know 1. how compromised is "compromised", and 2. what the reviewers think of it when they actually get their mitts on them in person later in the year.
I find that hard to believe as well, but my fingers are crossed. I do think that it makes Panasonic seem a little funny though in that for years they've touted plasma as the be-all end-all of PQ (which it may be), but then all at once say "well we've tried really really hard now, and it no longer matters."
I will say though that among the very best viewing angles I've seen were the S-PVA panels from Sony a few years ago. I don't know why, but I've noticed it a couple times already. I SO had my hopes up with IPS only to be completely let down in the end. For example, their 2012 ET5 was "supposed" to be fantastic in viewing angles, and just ........ wasn't.
Sounds like this new LED lit LCD is about 91% to KURO/ZT IQ with another 5% of hair spiting trade off qualities.
I see no need to get a spare ZT panel since in another couple years the quality should be there and the price should be lower.
I'm looking forward to any additional info. I'll eagerly devour a shootout review done in a controlled environment when it becomes available.