An article in The Wall Street Journal reports that Makerbot, a 3-D printing company focused on consumers and very popular with hobbyists, is in acquisition talks. The company has a key asset, its massive Thingiverse design library, which gives consumers access to nearly eight times the number of designs that 3D Systems' (DDD -3.74%) cubify.com library contains. Should 3D Systems investors be worried? In the video below, Motley Fool industrials analyst Blake Bos discusses how 3D Systems' business differs from Makerbot's, and ponders just how big of a threat this company might be.