Blu-ray Disc and HD DVD will be expensive to buy, and the fact that there's two competing standards doesn't help either.[Reuters]By offering discs with far more capacity than current DVDs, the groups hope to breath new life into the $24 billion home video market. But their failure to use a unified format has paved the way for a costly battle similar to the VHS/Betamax video war 25 years ago that caused widespread customer confusion.