I see what you are saying.

Any software as a service (re: cloud) runs this risk -- which may indeed turn out to be the popular practice. However, for the open community, this will be a chance to reach out further without as many roadblocks in the way (eg. popular platforms that also happen to be closed), and reduce the cost of trying/using open software. If nothing else, I see this blossoming into some exciting new possibilities for open developers

From a tech perspective, it's cool, but we agree that it won't exterminate closed-systems -- not by a long shot. However, it provides ample footing for the open community to extend its outreach, which if nothing else, should be interesting.

But we're way into speculative territory here!