Atoff, the reason for most FDM printers being a garage machine rather than an office one is noise, fumes and childproofing. Granted, SLA is almost silent, and SLS keeps fumes to a minimum, but households with children will still have big problems with keeping either of these in their living space.

The closest look we get at the future of 3D printing is PolyJet printers like the ObJet lines from Stratasys or the ProJet line from 3D Systems. The problem with these is that the technology for PolyJet is locked behind layers of patents that won't expire for years, and neither company seems to have an entry level printer planned. Additionally, the PolyJet process is pretty much guaranteed to use proprietary material cartraiges no matter what competition does to the price of them in the future, meaning material prices will remain outrageous for them.

FDM, SLA, and SLS will remain the "peoples' printer" for the forseeable future, but barring a major game changer in either 3D Systems or Stratasys, the real future of 3D printing will remain in the boardroom for decades to come.