I'm not sure I agree with the notion that OSS is where all the innovation is happening. There's certainly plenty of innovation there. But most innovation still seems to be privately funded developments (esp startups) which get open sourced. Or not. Has there been any empirical work on assessing it in recent times? Maybe post 2010?
For almost everything that requires other expertise the innovation is still done in closed source software.
Stuff like photo editing (LightRoom, Photoshop, Capture One), video editing (Premiere, Flame, DS), high end rendering (Renderman, 3Delight), CAD (Catia, Solidworks, NX), embedded systems (almost anything in cars, airplanes, appliances), and a million other areas are all still as closed as can be, and open source isn't even competing, much less innovating.