I'm being super pedantic, but it's not, the switches and especially keycaps are different from what they use in e.g. a Macbook Air (and not just in size). For 99% they'll be close enough, but for me this makes the magic keyboard a no-go.
I'm still looking for the holy grail, an external keyboard that's a near copy of the Macbook keyboard. I'd be willing to spend $500+ on it, but haven't found anything. Or, similarly, a keyboard that is even softer and lower travel than the Macbook keyboard. Nothing seems to have a similar actuation profile. I once found a website that showed actuation profiles through graphs, where you could pick from dozens of switches - none of them had a similar profile. Wonder why, is it hard to make? Is there really no market? Patents?