It's mostly that Nolan makes camera and sound decisions based on the theater experience which assumes a certain visual scale, projector dynamic range, surround sound system, and so on. Because the format and equipment utilized in a high end movie theater is significantly more capable than everyday home televisions, these choices often lead to a poor viewing experience at home. All these issues could be resolved technically, but home theater formats are kind of a mess in general.
Unfortunately that's not it at all. He's widely quoted as considering dialogue to be just another sound effect.