I'm increasingly thinking that the biggest competitor we have isn't other forum software (who aren't innovating), but Github.
Our startup ( http://microco.sm/ ) is working on improving communities, which most people read as vBulletin, phpBB, Discourse... but my view is simply that if you have a group of people together around some interest (topic, locality, project) that they want to communicate, share, transact at every level.
And that, the fragmented experience of going to Google Maps, Facebook Events or Eventbrite, Wikipedia, review sites, eBay, etc... just to bring the last 5% into a community... well that's frustrating and a poor user experience.
Instead the first 60-80% of the functionality elsewhere should just be in the tool. Where the community already is.
And we're starting with forums and going outward, in every direction (it feels). And here is github, starting with the code, and also heading outward, in every direction.
I've a great deal of love for Github (as a dev, how could I not)... so I wish them well. They're solving things from a dev/work perspective, and we're aiming at consumers/users/hobbies/interests... but still, I've no doubt that we've a lot to learn from them, and when we're up to speed perhaps we can teach them a thing or two.