They don't say what version they are streaming though.
If it isn't the current build then there will be some awkward questions about why they haven't released anything this year.
Several sources (it has also been rumored these past few days) have said that streamers will be playing the current 2.6.3. And it's still up in the air whether or not CIG will even be playing/streaming 3.0 or not seeing as it's a crash fest, a performance hog, and none of the shit they've been showcasing on their broadcast, actually works.
Mere months ago both GameStar.de and PC Gamer claimed to have
"played" 3.0. It would be hilarious if CIG didn't actually play or show 3.0.