Blu Ray, as a medium for distributing feature films, is dead. It was the last mainstream physical format. We will not see its like again, etc. Taken from us too soon, it never properly escaped from the shadow of its older brother DVD, largely because unlike DVD the advantages presented by Blu Ray never particularly outweighed the disadvantages.
Dredd is one of the few times that I have paid out cash money to see a 3D movie, essentially because I'm a huge fan of 2000AD (with a much dog-eared, torn and graffiti-ed copy of issue one in a box under my bed), and there are no 2D showings within sensible distance. Three dimensional movies give me a three dimensional headache, invariably leading to very much three dimensional rich, brown vomit in the car park afterwards.