It’s nice that they’ve cut the prices so significantly, but it’s still $10 more to upgrade Windows than OS X. And this price pressure can’t be doing wonders for Microsoft’s margins. Trust me, I have an MBA. That’s like the second thing they teach you. After Yacht Maintenance (spoiler: you pay someone else to maintain your yacht).

When you can’t make as much as you used to on your software, I guess it makes sense to start making your own hardware.

Added: Somehow I wasn’t aware Mountain Lion pricing had been set at $20. And, of course, as Josh Stoner points out, that $20 upgrades all your Macs.