I had thought so. On closer inspection though, it's unlikely.
Why? Have a look at reference sites online. There were plenty of sites like experts-exchange before StackOverflow, and if you trawl Google Groups, you'll see a similar thing. Plenty of people asking technical questions, not so much anything else.
Certainly, you don't see medical students out there asking the best way to diagnose a rare disease.
There is one exception though -- Travel sites. Travel questions and forums are pretty big, and I think a Q&A site for that could be enormous.
Meanwhile Yahoo Answers, AskMeFi, etc continue to fill the gaps for other niches that might actually work.
Why? Have a look at reference sites online. There were plenty of sites like experts-exchange before StackOverflow, and if you trawl Google Groups, you'll see a similar thing. Plenty of people asking technical questions, not so much anything else.
Certainly, you don't see medical students out there asking the best way to diagnose a rare disease.
There is one exception though -- Travel sites. Travel questions and forums are pretty big, and I think a Q&A site for that could be enormous.
Meanwhile Yahoo Answers, AskMeFi, etc continue to fill the gaps for other niches that might actually work.