Blu-ray Disc™ has more than five times the capacity of a DVD:

Standard definition video displays moving information at up to 10 megabits per second with a video resolution up to 720x480 pixels. Blu-ray Disc technology delivers content at up to 48 megabits per second with resolutions up to 1920x1080. The 50GB storage capacity of one Blu-ray Disc (dual layer) is almost six times more than a DVD disc. This represents the opportunity to fill each disc with as much exciting content as possible.

Up to 8 channels (7.1) of lossless audio:

With so much storage space available on every Blu-ray Disc, up to eight channels of uncompressed or technically lossless sound can be used. Movies and music have never sounded better in your home theater setup.

Advanced durability coating:

All Blu-ray Discs are treated with special scratch resistant materials. Prints and oil left behind by fingers are now easily wiped away. Handling a disc over and over is now no longer a problem, with its protective coating to ensure years of enjoyment.