You're right...it's really just a quasi-update. No models were updated...just pricing and a discontinuation. But it should be noted in some form, as you wouldn't expect another update immediately after that sort of event. It's an inexact science. Well, it's not really science at all. 😉
The extreme version of this type of thing is the displays, where the specs change only rarely, and so price drops are what generally constitutes an update.