Exactly. Broadwell will be a significant upgrade. I still don't understand why there has been so much anticipation for a Haswell Mini. Apple still may refresh the Mini with a Haswell version. Except where Haswell systems have shown an improvement graphics performance they just aren't that much of an upgrade from 2012 Ivy Bridge and anyone who read what Intel said about what to expect from Haswell has known this for the last two years.
Considering a refresh rate of 2 years for the mini, I wouldn't think that Apple would not put what will be a mediocre bump for the purpose of releasing a "Mac of the future" when in a shrinking PC market they really need a performer not only in CPU but GPU also. Broadwell would satisfy that 2 year refresh rate.