I do believe that the real question is : can we have a tv that has a good picture with every sources in every conditions, with a good design and is simple to operate ?
I think B&O tvs go in the right direction.
I think that a BV7-40 MKIII has got a good picture with standard definition and a very good picture with HD.
So, buying a B&O tv these days is a reflexion about the price (sure, it's very expensive), but i think for the price, we can get a very good package in terms of picture, sound, picture processing, design, integration...
Of course, the Avant could last 20 years.
A new B&O tv can last at least 5 years if the sources are not changing (standard definition and 720 + 1080p).
I trade my BV3-32 for a BV10-40, and i'm really happy with the picture.
Plus, i got a very good sound (not the Avant sound, of course, but it's really OK), an amazing design, the Beo4 remote, the PUC...
4 times the price of a samsung, but so much more attractive.
Of course, the 17 000 Euros BV12 is another story...