Market leaders, BD, and not for some vague reason of brand either. LG [Lucky Goldstar, for those that have always been curious as to the initials] press them close, and occasionally leapfrog on the technology, but you're very safe in the knowledge that you've got just about as good as it gets, if you purchase a Samsung TV.
Sony, Panasonic and the rest are sprinting just to keep from falling further behind the above two manufacturers, in brown consumer electronic goods.
Bit of trivia. When I was in-between summer terms at Uni, I occasionally went to work for Comet, and managed a couple of stores after, back in the 1990s. I saw the emergence of Samsung in the main consumer market. Their products were always of very good specification and feature rich. Their reliability was reasonably good right from the start too, but of course nobody knew of them. It didn't take too long, because Samsung didn't stick behind the other companies. They innovated.