The problem with TV's like that, other than the cost, is the size. Those speakers are non-upgradeable and non-removeable, meaning that if you do decide to upgrade the sound then you still have those great lugs on it. It's much better to not have to pay the extra for those speakers and then sort out your own.
Well anyone buying that tv wouldn't be using anything other than the tv speakers. Otherwise they would buy sony's offering without the speakers built in therefore they can use external speakers without any issues. Basically people that complain about built in sound there are options out there with absolutely fantastic built in sound but yes they aren't cheap which is what they will cry about when they see the price of such tv's. They want everything but not prepared to pay for it.
You see it time and time again. TV manufacturers are ripping us off by purposely making crappy speakers so they can sell us matching soundbars. Well how do you explain that sony tv linked above then? The speakers on that honestly would blow anyone away for a tv. I was amazed when i heard them I had to ask is all that sound coming from the tv as I didn't think it was possible.
Thinness should have no bearing on the SQ, it's purely down to the budget allocated for the built in speakers. Sonny should know this having owned a 42pz85. the PZ80/85s had some of the most god awful speakers i've ever heard in a TV and they are not thin Tvs in any sense. Well, compared to CRTs they are but yeah.
The PZ85 had alright sound tbh in fact it was a lot better than the GT50.
The PZ85 model had a soundbar built in albeit a pretty crappy soundbar it was better than the GT50's speaker offering by quite a big margin.
It wasn't great but I wouldn't say they were awful either.
http://www.flatpanels.dk/billeder/panasonicpz85-1l.jpg
that big silver thing under the tv is the tv's speakers. for anyone wondering what we are talking about.
trust me the GT50 (thinner tv) has awful speakers i would rate them as like a 1/10. the pz85 a 4/10. ysp yammy soundbar a 6/10. 5.1 setup 8/10.
obviously the perfect 10/10 home setup would be some fancy dolby atmos setup with 2 subs, etc.
you really need to experience other tv's built in speakers if you think the pz85 was awful. if you cranked up the volume yes they struggled immensely and you would be forced to turn them down but they were still better than the gt50 by a long way.