The new Surface Laptop isn’t just a refresh. It’s Microsoft’s first clamshell laptop with Qualcomm chips inside, and it represents Microsoft’s most serious attempt yet at a transition to Windows on Arm. The company’s previous efforts at Arm-based Windows machines were flawed, with poor app compatibility and sluggish performance. Now, Microsoft is trying again to finely balance processing power and battery life in a way that only Apple has achieved in laptops so far.This time around, Microsoft ha...