The final OS is one thing (hold back whatever you want there), but where is the SDK? Developers need that if you want them to be ready (and you can always put y

The final OS is one thing (hold back whatever you want there), but where is the SDK? Developers need that if you want them to be ready (and you can always put your super-secret magic in the first post-launch SDK update). To me, the MIA SDK is the troubling sign.