While Warner Bros were the only dual-supporting studio, they came up with a combo disc (managing to put both formats on one side at different depths) but no-one else was interested. I can't see these combo-R discs taking off now the format war is more-or-less resolved. For starters you'd need both a HD-DVD-R (how daft does that sound?) and a BR-R drive. Ritek have just wasted their money.