This shadowy render is the best glimpse Microsoft is giving us so far. | Image: Microsoft Once upon a time, Microsoft had to write off $900 million betting an Arm-based Nvidia chip could power its first flagship Windows portable, the original Microsoft Surface . But today, it's trying again. Microsoft and Nvidia have just announced the Surface Laptop Ultra, a computer with a new Arm-based Nvidia chip at its core. There's a lot we don't know about the 15-inch Surface Laptop Ultra, such as its final specs or the foggiest idea of what it might cost. But Microsoft is promising it's the most powerful Surface, period: "This is the most powerful thing we've ever made," Microsoft Surface boss Andrew Hill replies, when we ask how it stac … Read the full story at The Verge.