This industry is intensely competitive. The original company is 3D Systems which went public on the Vancouver exchange in 1986. There is an interesting story about raising capital in their history.
Comments by SSYS cheerleaders on Silicon Investor claim an advantage for SSYS because they had a smaller, less expensive machine, although it lacked the precision of the 3D equipment, and the plastic they used produced more flexible models than that used by 3D.
3D brought a desk top model to market that sells at a price close to the SSYS product ($21,000?) and on December 10 introduced a new plastic medium which appears to be more malleable.
Does anyone have a good estimate of the impact of these innovations on the competitive structure of this market?