Well, no longer. The game finally has a release date and it will be with us this month in fact. The first of the three episodes planned will launch February 23rd on PC, PS3, PS4, Xbox 360, and Xbox One. Mobile versons come later.
Thankfully, there won't be massive gaps between episodes either. Episode two will come in March and Episode three in April. Lovely. That keeps us losing too much momentum.
Hopefully we will get more release schedules like this from the studio in the future. With Minecraft: Story Mode also having short gaps between episodes, I bet that is likely!