Over the past year, Mark Zuckerberg has transformed Meta - and himself. He has gone from a brash young CEO to trained MMA fighter, and a trendsetter with his fur jackets and chains. And thanks to his year of efficiency and stellar stock performance, he's now a Wall Street darling, with Meta outperforming Apple and Alphabet, trailing only Nvidia among the Mag 7. But Meta's latest earnings report has shown it's continuing to bleed cash, and Zuckerberg is now facing a moment of truth. Can he deliver on generative AI, the most important platform shift in decades? This week on TechCheck, the reinvention of Zuck and the arrival of his "show me" moment.