As the latest TB3/USB-C 3.1 displays can be a power-source, it occurred to me that maybe the next Mini will be so small and power-efficient that it can be powered by such a display. The LG 4K display can deliver 60W - that's much more than the power-supply of the 12" rMB and about on par with the power-supply of the 13" MBP. I'd guess it would have two USB-C ports and the combined audio port. They could probably reduce the size to that of the Magic Trackpad. Of course, it would be about as upgradable as the new MBPs (not at all). But if it had Core-M CPUs, it could be built fanless and as such have no moveable parts. It would be totally silent. No dust being sucked into it, clogging-up the fan after a while. I really like the quietness of my Mini. I'm actually thinking of ordering replacements from Aliexpress just in case - they're available there for a fraction of iFixit's price.