I think the confusion is that the AI article is only speculation by Prince McLean. The "reports" linked to are only about the Blu-ray situation and iPhone sales. The conclusions of what this means for Apple all come from McLean.
You're just going to go down to the ground with this, aren't you? If a cable (or adapter) that's mini-DP to DP comes along in 2 months, will you still say it's such a terrible mistake? How many monitors have only DP input? (Apple already makes adapters that go from mini-DP to DVI, mini-DP to dual-link DVI, and mini-DP to VGA).
You seem to want to win an argument rather than look at the real possibilities (and probabilities).