The Mac mini has never been marquee enough to warrant being the focus of the tagline. Plus, Apple did introduce the last major design changes to it quietly and there's no reason to assume they won't do so again. Nor has the displays, nor has the iMacs. The iPads are, but it hasn't been that long. OS X Yosemite is, but as with the iPads, it hasn't been THAT long. MacBook Pros are timely, as are MacBook Airs; there are chips out for a Mac Pro update, but even back when it was updated in a timely fashion, the Mac Pro would get updates over a year apart.
Barring new products, I can only assume that iPods will get a major update here and that's because you can literally eliminate every other product logically.