I don't think it's guaranteed at all... At least not in the immediate future. Even if it was just a spec bump, it'd still show up in all the leaked part number lists...they probably are getting an update its just not going to be a grand redesign or a retina display (or if it is maybe due to the lack of overall redesign its being downplayed).
at the very least internals are getting an update thats almost guaranteed without question; you do need rumors for that.
Me too. Seems a bit too coincidental though... No mention of the iMac on the list that was reported a couple of days ago, and then there just HAPPEN to be no last minute rumours today either, when everything else is covered?If that list indeed was complete. I'm hoping it wasn't. >_>