Have you even seen the low-end 2014 Mac mini? It's a 1.5GHz CPU that's supposed to go in ultra-portables. The worst part is, that CPU is more expensive than a regular CPU, so Apple made two mistakes in what is supposed to be their entry model to OS X.
I just realized what they're doing. By artificially crippling the latest generation of Mac Mini, it will mean they can claim greater gains later when they switch from Intel to ARM. Mac Mini and MacBook Air will probably be the first lines to switch.