It's purely a business decision. It's great for Hollywood, but bad for theaters. Just think, no need to make prints of movies. Also, this reduces piracy because this prevents prints from being digitized on the sly. With digital films, it's sent via satellite. All this requires expensive infrastructure paid for by theater owners. I'm sure there will be expensive software and hardware upgrades too. I can watch movies digitally at home, why pay $15 to go to a theater?