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Thanks for your interest, but I can't talk about future product plans.
Regarding the SDK, it's noteworthy, though, that no details about it
are known at all. Noone can say right now what will be available to
whom at which terms. Without that knowledge, it's - apart from the
policy not to talk about future product plans - impossible to say
anything about which role the SDK will play or whether it'll play a
role at all (as nothing is known, it could just as well be a web
widget creation tool or a set of extensions to HTML, CSS and
JavaScript events for Mobile Safari).
Best regards,
Felix Schwarz