I don't think it will make much difference to those theists that do not believe in evolution currently. There is now pretty much overwhelming evidence that we evolved, yet a certain percentage of believers will not accept it, so they probably will not accept any new evidence of how life originated either, they will just say scientists are mistaken or making it up.
As far as theists who accept evolution, I doubt any new findings will cause them to lose their faith in God, they will just accept the new evidence, but still feel that God exists, because they prefer to believe God exists.