Ultraviolet Digital Copies are terrible.
Basically they create a whole new program on yor computer for these Ultraviolet copies, and they can only be viewed on specific mediums. I.E basically only on your computer or some sort of iPhone or iPad or device like that.
Old school Digital Copies were good cuz you could just download it, and throw it into a folder that YOU create and put it on to any device that displays video (I dont have an iPhone, and i still use my old school 80 gig iPod, so I can not put these Ultraviolets onto my iPod)
Its just a way to further segregate these mediums to make sure that you MUST watch things through this particular medium.
Not a fan... wish they could just find a format and stick with it for a substantial period of time.