Talking to people in the community my impression was that 1.0 would appear when 1.0 appeared and that they felt that given the difficulties faced by other languages and the work required to produce a language that was fit for purpose in the modern context, a gestation time of more than a couple of years was reasonable.
In terms of community I think that the economics community and private equity firms in particular seem to have picked Julia up enthusiastically.
Having said that, I suspect that it will be three years before Julia becomes mainstream, and then it will be a minority choice for five or six more - if it is the big success it deserves to be!
It was said that v1.0 was due in early/mid 2017, but it looks like it's still a ways off.
There is (or was) a window of opportunity for Julia to steal mindshare in academia from MATLAB and R, but it feels like Python is beating them to the punch. Of course, Python had a 21 year head start.