Apple's products may have increasingly large capacity for storage , but the next big thing from the Cupertino, Calif.-based computer giant may eliminate much of the need to save songs, movies and other large data files. Reports this week said Apple has purchased the domain name iCloud in preparation for a push into the growing cloud -based services market. Cloud computing allows users to store all their data on commercial servers and use products and applications without buying them. To Debut at WWDC? Sources told the website AppleInsider that the company will expand its MobileMe service that currently allows bookmarks,...