Reminds me of Chrome. Lots of competing alternatives. Google comes late yet still manage to take over the market organically very quickly by producing a superior and more robust alternative.
Mozilla aims to continuously steer the direction in which the web develops. As far as a software layer developed by an academic research group, I'm sure they will be extremely happy that they could set the agenda with early software, and now get to pass the baton to an industrially supported codebase so that they can focus on the next generation of innovative ideas.
While the dominating market share of Chrome over Firefox could be considered a battle loss for Mozilla, the maturation of Tensorflow (and other frameworks which leverage GPUs and provide a higher level interface for ML algorithms) may be considered a big win for MILA.