"TimeScapes" just came out. It's the first movie to be released in 4K! The cineform 4K version is 140GB and is delivered to you on a hard drive.
Or to put it purely in terms of vertical resolution, this is offered in:
2304p - 4K
1080p - Blu-Ray
480p - DVD
Essentially, what he's done here is allowed the public to purchase the file/disk that would normally be sent to a movie theater with digital projectors.