A large amount of that comics market has been claimed to the app ComiXology; it's usually been the gold standard for a lot of comic-dom's digital offerings. However, as with other things, it's almost impossible to enforce a standard.
DC Comics has partnered with ComiXology in order to produce their own digital offerings, and distribute them to their audiences. This app uses a lot of the same technologies as ComiXology's, like the Guided View, which allows for easy touch-based scrolling. Readers will be able to buy and read individual issues of comics, as well as large collections of back issues at once.