Who's the Winner in the Tug-of-War between 'Walled Garden' and 'Open Plain' Strategies?

I snagged this article from wharton

Who's the Winner in the Tug-of-War between 'Walled Garden' and 'Open Plain' Strategies? - In August, less than three months after the introduction of Apple's iPhone, a New Jersey teen announced that he had "hacked" into the mobile-communications device. The hacker was clearly expressing the frustration that many consumers feel towards Apple for adopting a "walled garden" -- as opposed to an "open architecture" or "open plain" -- corporate strategy. While the walled garden approach often restricts consumers' ability to modify devices or marry them with other firms' products and services, the open architecture approach has its drawbacks as well. Wharton faculty and others look at the advantages and disadvantages -- to both consumers and companies -- of these two strategies. [Wharton, knowledge]