Microsoft is confident that it finally nailed the transition to Arm chips — so confident that, this time around, the company spent an entire day pitting its new hardware against the MacBook Air.On a recent morning at its headquarters in Redmond, Washington, Microsoft representatives set out new Surface devices equipped with Qualcomm’s Snapdragon X Elite chips inside and compared them directly to Apple’s category-leading laptop. I witnessed an hour of demos and benchmarks that started with Geekbe...