Interesting thoughts here, speaking as someone paddling in the shallow end, as it were.
But I think the first wave of Borg's 5 year evolution will come from the aftermarket boys using the stuff to make masters to cast.
Look at the work by live resin, astonishing detail on those modern weapons sets, & 'scopes, stands, mag-lites, helmets, etc....
The big stumbling block is skills to get ENOUGH people trained on the software, to get critical mass.
Then the software costs need to come down to mass-market levels, eg. Sketchup is free, but you need add-ons to use it for manufacture, not all of these are free, or maybe the guys that offer "print the parts for U" service should take files in Sketchup format, then it would take off!
I think the 'big boys' may stumble over scalability. eg, It takes big Dollars to design & cut steel moulds, but therafter they can knock out a kit in, say, a minute, (60 per hour/ 24 hrs/day, 365 days/yr, etc, etc etc).
Judging from what I've seen at my Uni, the machines are frequently left running OVERNIGHT to produce parts with the size & complexity of a 1/24th scale car body, or a holder thingy to clamp an I-phone to a bike!
So watch this space, progress & cost falls with be rapid, but don't hold your breath just yet.