http://biz.yahoo.com/prnews/050929/sfth060.html?.v=32
Some of their facts:
Capacity: Blu-ray Disc's capacity is 50GB. This will be available at
launch for BD-ROM, BD-R, and BD-RE. This is 67% more than HD-DVD's 30GB
ROM capacity and 150% more than its recordable storage capacity -- a
critical issue for computer users.
Managed copy: Managed Copy is not a function of the optical disc format,
but a function of the content protection system. The AACS content
protection system, which is used by both Blu-ray Disc and HD-DVD, enables
managed copy and network streaming functionality. It is not format
specific.
Hybrid Disc: Blu-ray Disc was the first format to introduce a hybrid
disc that could hold both high and standard definition versions of a
movie on a single disc. The Blu-ray Hybrid Disc is the more elegant
solution as it holds both versions of the film on the same side of the
disc, which provides for easy labeling and greater ease of use for
consumers.
Backward Compatibility: Blu-ray Disc players and recorders can and will
support DVDs through the addition of red lasers in the hardware. In
order to be backward compatible with DVD, HD-DVD must also include a red
laser.
Interactivity: Blu-ray disc is built on BD-Java(TM), which leverages
years of industry investment and experience in the set-top box, PC, and
cell phone industries. BD-JavaTM provides a mature, robust platform for
authoring and delivering unprecedented interactive capabilities to the
user for movies, music, and games. BD-Java was selected over iHD, the
developmental Microsoft technology used in HD-DVD. The BDA carefully
compared both iHD and BD-J, and concluded that iHD didn't go far enough
in providing a compelling feature set beyond DVD, while BD-J offered
studios a much richer palette for providing a compelling interactive HD
experience for consumers, particularly when a player is connected to a
network.
