They "take the case" when they grant certioriari. This just means they want briefs submitted. After they grant cert they'll schedule oral hearings. They can still deny cert.

I think it's very difficult to deny cert in the Texas case. There's no question of standing. There's no question of circuit splits (because suits against States go straight to the Supreme Court). They really can only dismiss because if they claim all the claims in the Texas suit are baseless, and that would be really outrageous. So I think they'll take the case. But first, briefings.