I remember reading CRT have a lifespan of about 60,000 hours usage and that after 60,000 hours usage, the light ouput only drop of 10%, which is amazing.
So, I can imagine SED having the lifespan similiar of CRT.
Although i do agree that the cost will be very expensive. I wouldn\'t be surprise if this 55" be selling for $20,000 when it first comes out.
But as with history and patterns have shown, as with time, cost of those new technology will drop. Who knows, maybe in a few more years, you can see them costing as much as the 50" 1080p plasma that cost $8,000.