Wholers presented an updated 3D printing forecast in August 2014 which represented nearly a doubling compared to their 2013 forecast. According to Wohlers Report 2014, the worldwide 3D printing industry is now expected to grow from $3.07B in revenue in 2013 to $12.8B by 2018, and exceed $21B in worldwide revenue by 2020. Wohlers Report 2013 had forecast the industry would grow to become a $10.8B industry by 2021.
Motley Fool commenting on the report indicated that this could represent a major upside opportunity for investors in 3D printing stocks: