I'll let KPOM speak for themself, but the reason I want an M2 Air is for travel (and, yes, the svelte industrial design of the thing).
When I was rocking a 15-16" MBP as my main machine - a secondary smaller, lighter travel laptop made more sense. The bigger laptop doesn't work in an economy seat and if I had a current 16" MBP, I would be hovering over the buy button tomorrow. With the 14" I can totally use it for travel, so even though I want the M2 Air, there is no reasonable justification to get one. Curse you 'logic'!
But, oh that sexy Midnight Blooooo!