Apparently he's going to join Amazon to lead their Echo and Alexa hardware division: https://www.theverge.com/2023/9/18/23879036/microsoft-panos-...

Makes sense since Microsoft seems to be increasingly weaning off hardware, aside from Xbox. Their hardware refreshes for the Surface lineup have been very slow and counterintuitive (e.g. what happened to the AMD-powered lineup). Uncertain how much influence Panay had but as the hardware chief for Surface, I expected more.