Today he played like he was the main man. He actually made fewer dribbles than Mahrez, touched the ball less than KDB, Gundo and Mahrez, made few passes than them, but the game revolved around Grealish, on both sides of the ball. He was what the Spanish would call the protagonist of the game. That's what was different today vs. his other very good games for us.
Also I know people like to act as if the commercial side of the game is a side show, but it really can't be understated how big an impact Grealish and Haaland could have on that side of things for the club.
He's already getting £50m from Puma and £10m from Gucci. If he plays like this more often or in the CL then he's not just going to win loads, he's going to find himself a genuinely global superstar, a household name worldwide alongside Haaland.