Blu Ray is here to stay a while. Alas in a way, because its rather disappointing compared to full uncompressed HD, but even for the really good consummer grade TVs and screens, it's good enough (in a professional screening room, the difference between BR and the original source is rather unmistakable). There's still room for much technical improvement in the home market for it to catch up to the quality of the HD sources, but there's no way the MPAA and co. would even support the introduction of something better much better than BR on the consummer market in a foreseeable future.