Oh really now?
(not a recent reply, but still valid)
It really isn’t hard to find an answer. Let that alone, it really isn’t hard to guess an answer. It will come out when it’s ready.
You might not have bad intentions asking this question, but you have no idea how many times people asked this and how many times this question was somewhat answered.
IMO though, I wouldn’t say it is possible to make any accurate guesses. Might be a whole year away. Might be months away. Might be two years away. At the end of the day, it is ready when it is ready.
An official announcement about not just a release date, but for a public beta release date would build up unneccessary hype and could easily fail unless nelson himself is sure about it.
Also this
Confirmed by the man himself. 
Edit: LOL He apparently asked the same question not so long ago