I think it's fair to say that open source has made inroads everywhere. If I were to tell my 30-year younger self what the future looks like, I don't think I would have believed myself. Having said that, there are lots of places where open source is having a hard time. In telecom and medical software for instance. I mean, I can set up a SIP server and inspect the Android source code, but there is a long way to go (like actually being able to build and deploy on a piece of commodity hardware in the case of Android). For medical software, just try to get access to source code for any medical device. You get the thing installed in your body and you can't even look at it.

Like I said, in every place open source has won important battles. The future looks good, but let's not understate the challenges either.