Which technology? We definitely do not need higher resolutions or bigger discs or better sound or whatever. SD TV had to die for a long time but the current HDTV resolutions are here to stay for a long long long time.
So if it comes to buyable media BluRay will be most likely the used standard till the end of time (Which explains why Sony Toshiba and co. invested so hugely in this war), Once BluRay discs and players are available for the same price as DVD, DVDs will slowly die.
So the only technology you can talk about are downloads. Which most likely will be a success and the biggest competition to BluRay. Sometimes in the far away future for most countries and regions that is. For comparable quality you need huge datarates (BluRay is 54Mbps), Really big HDs to save your movies and last but not least you will have to fight with all the standard download problems: You cannot sell or lend them you can only watch videos on devices that are connected to your download service and so on.) Yes downloads will be a big competition and eventually they will take over but this will take a long time.








