As we sit here in the midst of almost explosive growth within the industry, what excites you the most about the potential within the 3D printing industry over the next 5-6 years?

I'll start. Most of the predictions I find say that printer sales will double each year for the next 4-5 years. This means the community of 3D printing enthusiasts will grow, leading to even more incredible designs, innovations, and affordability. I personally think many analysts are underestimating the market potential over the next 5-6 years. By 2020 things are going to be crazy in my opinion. I know I am biased, but exponential growth will catch many off guard.