I understand an exact date may not be possible but is there an estimated date for the release of unity 4? likely this month or not yet?
When it’s ready *TM
Meltdown hits the nail on the head. No ETA, we want to get it as good as it can be before release.
Not even a large upper bound? For exemple is it within 6 month for sure or can you not even guarantee that?
No, sorry 
But we are in Beta, so it shouldn’t be that long.
I’d guess somewhere next year. From what I’ve seen it looks too rough to come out any sooner.