I think that FDM printing is going to go the way of the dodo pretty fast. It's slow, imprecise, and prone to messy failures. I say this as someone who owns a Replicator1 and a Printrbot Simple, both FDM printers.
I think it's more likely that this purchase is going to let MakerBot start competing in, and eventually dominate the hobbyist/prosumer stereolithography space, currently being owned by the resin-based FormLabs Form1 printer, with the b9Creator and mUVe1 hot on its heels.
That is, provided Stratasys shares some of its stereolithography knowledge with MakerBot. Enclosing the build space is rearranging deck chairs on a T. Rex while the mammals are evolving thumbs.