Furthermore, that price tag doesn't include a keyboard. Every Surface RT ad Microsoft has ever done has shown the tablet with a Touch or Type cover, suggesting that right out of the box, you're good to go, workwise. You're not.
Ah, you argue, but the iPad doesn't come with a keyboard. The Nexus 10 doesn't come with a keyboard. Why hold the Surface RT accountable for the same omission? Because it's a Windows-powered tablet, one that's ostensibly designed with productivity in mind.
Indeed, Microsoft bundles Office Home & Student 2013 RT, a great suite by any measure -- but virtually useless without a keyboard. Alas, the Touch and Type covers still cost $119.99 and $129.99, respectively. So now you're still looking at around $470, minimum, for what I would call a properly equipped Surface.