Not negative at all I just want people to know their weaknesses, no matter how good a dimming system you always will have to compromise with a panel that lets more light from behind. Black levels suffer, contrast ratio is worse and their days are somewhat numbered for an outdated tech.I think you are being a bit too negative here about the TV and IPS panels. There are surely those (inc. myself) who find VA panels don't make for great viewing if you sit off center. In that essence I've personally found the picture to be worse than an IPS panel if you sit anything off center; doesn't make great viewing for family or if you have a few people watching the TV.
I personally managed to catch this TV instore before closing as it was quieter. The staff kindly accepted my request if I could view the TV with the lights down. I'm not sure what Panasonic have done, but I was impressed with the blacks - in some instances they were black black (obviously not OLED black). I think this TV could be a dark horse and hope for the price to reduce a little.
Given how release prices are on these TV's there's no reason other than knowing for sure you will get burn in not to go for a oled instead... United you can't fit 55" of course then your only option is an ips type TV.
Now that doesn't mean I'm saying colour will be worse, that smart TV or the upscaling performance will be badb there are of course more aspects to a TV than just its panel. I'm also not saying that these are bad TV's.. Just that in my opinion there are much better buys out there.
One of the main reasons I generally frown on IPS type panels for TV's is the number one complaint and reason people return TVs on this forum and that's bad screen uniformity. People hate DSE, they hate seeing vertical lines and patches on the screen that are lighter than others and this argument becomes even more valid in the hdr era where the backlight will be on full.
Not only that, but compared to the computer monitor market where IPS displays are very popular due to wider viewing angles and faster response times compared to VA that does not apply necessarily with TV's. TV's have a lot more processing going on which pulls the response time higher anyway negating the benefits of faster response time from a panel. This means the highest end HDR TV's with natively higher panel response times still manage to produce more than good enough motion once you factor in everything else that takes time to draw info on a TV. Couple that with TV's being larger and therefore more prone to uneven backlighting there are plenty of reasons not to buy a TV with an ips panel.
In all honesty if you need wider viewing angles you need to look at oled and if you can't look at oled due to size limitations you're going to get better performance from a good second hand plasma TV than you will from one of these. Ips panels are too much of a compromise and aren't needed anymore really on TV's when oled's are coming down in price.
Too many times have I seen horrible examples of poor uniformity from TV's and it's bad enough as it is using a VA panel with brighter TV's so I really see these as nothing more than a TV suitable for non critical family viewing with the lights on, fine for most people but not for most on an enthusiasts forum.
I say this as a Panasonic fan myself, currently owning a Panasonic TV and many before that. Now is not a good time to buy from them and I seriously worry about their future given recent business decisions and awful product support.
Let's hope I'm wrong.