Possibly,yes……. If the original HDD on my 2009 Mac Mini fails, and there is a 2016 Mac Mini, I would weigh up the cost effectiveness of repairing the 2009 vs the benefits of the 2016.
I was faced with the same decision in 2009, when the HDD failed and the power supply was dicky on my original 2005 Mini. Replacement with the 2009 was clear favourite then.
Probably, no…… The 2009 is still more than adequate for my humble needs. Though have been sone interesting tech developments since, there have been none of great significance to my one computer / no iDevice household.
Most likely my 2009 (base model; 2 Ghz, 1 + 4 GB RAM, 120 GB HDD, with an external 500 GB HDD for additional storage) with Mountain Lion, will soldier on a couple or three more years before it is replaced.