My main flatscreen is a 32 inch TCL Roku TV. I got it at a reasonable price of $130. it is my understanding that modern TVs have an expected lifespan of around five years, or 60,000-100,000 hours. (And your right, TVs are made so cheap, quick sell, low quality so they can sell me another.) Longer than that and you have yourself a winner. (Plasma is more robust.) I remember old CRTs were rock solid giving you a good 20 to 30 years of entertainment. The only time I can see myself paying a higher price for a flatscreen will be when they start broadcasting in 4K within the next couple of years. I will then get me a TCL 40 inch 4K. That would be the most I would want to pay. I guess I am just old school having higher expectations. If I could be given an idea that I can go out a get a flatscreen and it would last me the rest of my life, then I would be willing to fork out the extra dough. But it is not just the lifespan of the TV that has to be my concern in our modern era, technology just keeps changing. I use an outdoor antenna to receive my programming with the built in addition of the Roku of my TV. When they start broadcasting 4K my 32 inch TCL tuner will be worthless. Presently there is not a TV on the market that has a 4K tuner.
Having said all that.
Looking at this extra large paper-thin TV cashing in at 12-13K...
(My cats would love to shred this.) I cannot see myself peeling off enough cash to have this, especially with the fact that I do not have a wall in my whole house that could hang this thing. I would cover up a window or door. Realistically the only thing I could see this benefiting is a business. The company I work for have very large screen TVs in their meeting rooms. There might be those movie buffs out there that would love this to go with their curtain drawn dark room full of Blu-rays and DVDs. I have yet to see an AFV video were someone throws a Wii remote into one.
The largest TV that I could honestly accommodate would be somewhere around a 40 inch. 49 inch would be pushing it.