There are four significant rumors out there right now. One says the Mini's days are numbered. The other says that an update is in the near future. Another holds that the Apple has assigned a team to completely rework the Mini's internals. Yet another says the Mini is going to get smaller.
At first glance, all that might seem hopelessly irreconcilable but I have a pet theory and it involves the growing calls for a headless Mac more powerful than the existing Mini.
Yeah, I know some of you get very indignant about this topic, but Apple does bow to the will of its users from time-to-time. As evidence, I present... the Mac Mini, which itself came out amidst claims that Macs were too expensive and Apple needed a headless, entry-level machine.
Here's what I imagine could explain those rumors: Apple is going to refresh the existing Minis by bumping the specs and shrinking the case; along with that, they will introduce one or two top-of-the-line Minis with a bigger form factor than the existing line-up. The new large-size case will have enough space to accommodate components more on the par with the iMac. So the Mini as we know it will in fact be discontinued, replaced with this new version of the small Mac (maybe it will receive a name change as it might be sort of silly to call larger boxes "Minis." Mac Nano? Mac?) The new large size case will make room for one PCI slot and will allow users to access a RAM slot without using a putty knife while the smaller case Minis will exist for users who want smaller machines.
And then the displays. Apple is way overdue for a display refresh. I think Apple will simultaneously unveil a major overhaul of their display line-up, introducing some screen sizes suited to home users to sell with the new Minis.
Anyway, that's my theory. Take it or leave it.