No offense, but you're spouting off ignorantly (you thought the Pro was an Atom device?). The cheapest MacBook Air has exactly the same specs at exactly the same price. "which would arguably have a better feature list" is simply hogwash. Once you step down from your fanboi chair you won't be able to name a single feature the MacBook Air has over the Surface Pro. In contrast, as Bass points out, there are a few features in the Surface that don't exist in the MacBook Air (touch, digitizer/pen input). The price is high because this is a high end device, but it's more than competitive with devices in that range.
But the Surface doesn't have the world's most advanced operating system. MacBook Air wins.
Of course I'm shamelessly writing this on a MacBook Pro running Linux. I wonder, does this Microsoft tablet support running Linux?