Here is some information about storage capacities from JKalman's Wikipedia Link. This is exactly what I was referring to as far as most Blu Ray disks being 25 GB to Hd-DVDs 30 GB as an FYI.
As of November 2007, 44% of Blu-ray titles use the 50 GB disc and 56% use the 25 GB disc[90] while almost all HD DVD movies are in the 30 GB dual layer format.[91]
Not a huge deal at this point but does clarify and support what I was trying to say.
You don't get it... Those HD-DVD discs are using two layers to get a little bit more space than one layer on a Blu-Ray disc. That is A LOT less storage capacity. It doesn't make sense to use more than you need, so why would they use dual layers unless it is necessary? Why spend the extra money until you need to use two layers? HD-DVD, needs two layers in order to compete with one layer on the Blu-Ray discs... So they HAVE to use two layers on every disc in order to fit the information on it. That isn't a good thing for HD-DVD, that is a weakness.
A HD-DVD needs three layers to get one more gigabyte than a dual layer Blu-Ray disc. That is a huge discrepancy in storage space comparison wise.
Blu-Ray capacity:
Single layer = 25 GB
Dual layer = 50 GB
HD-DVD capacity:
Single layer = 15 GB
Dual layer = 30 GB
Triple layer = 51 GB
Blu-Ray has managed to achieve four layers on a disc, but so far does not have a need to implement the additional storage space, but for people interested in removable storage, that is a tremendous perk down the road.