The midfielder, who today saw the Club take up a one-year option on his contract, put in a man-of-the-match performance against his former club Wolves in the 0-0 draw.
It was the midfielder's first start for Blues since the 0-0 away draw at Bristol City at the end of January.
The form of central midfield pairing Maikel Kieftenbeld and Stephen Gleeson had seen the 25-year-old largely wait to come off the substitutes' bench for his opportunities.
But Rowett feels that Davis' showing at Molineux demonstrates that he still has a major role to play during the remaining games of the campaign.
"I thought Dave Davis was absolutely magnificent. I am really pleased for him because he has been very patient," said Rowett.
"Away to his old club, I am sure there was a little bit of that in the performance and certainly he is going to be a strong player for us in this run-in.
"He controlled the match with his physicality. He gets about the place; he holds people off and comes out with the ball. He does that really, really well.
"Maikel Kieftenbeld and Stephen Gleeson have been excellent for us this season but I think in the last three or four games there has been half an eye on putting Davo back in.
"Away from home with three midfielders I don't think it's the worst way to go about games and just be a little bit tougher and let the opposition try to break you down.
"If you can be very strong defensively around the half-way line, the more the opposition search for space, the more space comes to you, then it's up to your good players to exploit it."