Steve Jobs has never met a hyperbole he didn't enjoy mouthing. Remember "It just works — right out of the box!"?
So take this as apocrypha or urban folklore or friend-of-a-friend telephone tag, but apparently Uncle Steve — in reference to the iTablet (or whatever-the-hell-they're-debuting-this-Wednesday) — is saying of it "This will be the most important thing I've ever done."
Our advice? Let's take a one-day moratorium from all the speculation and just let ourselves be pleasantly surprised on the 27th. Mmm'kay?