Red Pill Philosophy has an interesting opinion on this business move. The point is that the Home Depot is selling the technology which will drive it out of the business at the end.
Maybe this is unrealistic, because Home Depot and other retailers are adaptable. But there will probably be some measurable impacts on this sector from home digital fabrication soon. Probably the companies that base they business model on overpriced plastic pieces will go have massive losses. Ant there are many of those companies.
See example here: http://diy3dprinting.blogspot.com/2014/01/small-example-of-3d-printing-changing.html
MakerBot source: http://www.makerbot.com/blog/2014/07/14/home-depot-diy-meets-miy-make/
