Samsung didn't know what it wanted to be.
Prices here in the US were multiples of prices in other markets. People are not stupid. If they know a projector sells for $3k in Europe, they will not be willing to pay $10k here.
The market is really crowded too and Samsung was a newer player.
The A900 was a very sharp projector and I think it would have done better if it was properly marketed. Samsung has deep pockets but I think they felt that ti would be years before this venture became profitable, if at all.
Edit: Samsung also had a debacle with the a700, which was a DLP. I think that every one of those broke and had to be replaced or refunded. They were all defective!