Well, Sony thought by 'killing off' HD-DVD that consumers would have no other choice but to buy their Blu-Ray players. After the 'War', sales of players have dropped 40% (ironically HD-DVD players only 15% as people pick up upscaling dvd bargans).
Do you think
1) consumers resent being forced into buying Sony stuff?
2) Disks are 'old fashioned', hard drives are the future?
3) Content providers are being greedy by charging premium rates for movies / content?
4) Other reasons?
5) Will you tie your colours to the mast and 'jump in' to Blu-Ray?