Re: Serious issue
OLED life is getting better all the time and is now good enough for most of us: we used to have tellies for > 10 years but I suspect that the norm is now about 5 years. You have to be prepared to tweak anything to get the colours okay.
RGB backlights and filters increase the complexity (massively so for 4k) and cost of LCD with the hope that scale will reduce this over time.
OLED scalability is based on the printable dream. If that ever happens then it will overnight become cheaper than LCD. Obviously, at the moment Samsung can't get good yields on large panels and is concentrating on screens for phones and tablets.