That's an excellent point. While it will definitely take some sales away from the original Makerbot, it will also definitely increase the size of the entire market, all of whom will now have Makerbot knowledge and be eager to see what Makerbot's next product is.

In certain circumstances, if Makerbot is constrained by cash or production volume, they might even see this as a good thing that lets them redirect their flow into a newer, better product. (I hope!)