Google refunded every single game ever sold on Stadia when it shut the service down in January 2023. Today the same company launched Playground, and the bet is the exact inverse of the one that failed. Stadia assumed the hard part of gaming was distribution. Stream $70 blockbusters to any screen, no console needed. The tech worked and the business died anyway. Playground assumes the hard part was always creation. You type "a platformer where the floor is lava and you can double-jump" and it…