BLu-ray is , unfortunately, a technology owned by Sony.
They will charge royalties to any company wanting to build one... so the pricing will always be a little higher than the open standard that was DVD.
Keep in mind that the reason music sounds like SHIT today is because SONY litigated to prevent higher sampling rates than the standard CD quality sound... which is pure shit.
THey prevented the marketing of Super Audio cds and tape for 12 years.
And, since the old man died... their products have turned to shit.