Reporting from Ultimaker. You know, the real OpenSource 3D printer, that actually DOES do open-source software development.
Our printer hit the market 2 year ago. It's still top of the line. Sure they are cheaper options, and even a Chinese copy. You know what, they don't get the same quality and speed that we do.
The Cube is noisy, slow, prints in low res (as it's not allowed to compete with the expensive Dimension 150) getting one of these will more likely disappoint you in the capabilities of 3D printing then providing you with something useful.
Stratasys buying Makerbot is surely interesting. As they are paying about 20k for each printer sold so far. So they are not paying for the current market, they must be paying for the marketing, and thingiverse. People have been pulling models off thingiverse already because of this deal.
As on the Ultimaker open-source side. We just released our new version of our Open Source software solution Cura. Which is all AGPL, the GUI and the engine. Everything is usable on RepRap machines, and you can follow development as it happens. No secrets here.