I'm withholding judgement for a few months. If all the canned content appears online and Wizards announces some new books to flesh out the schedule, I will be pleased. If they don't do one or both of those things, then I'll start agreeing with this apocalyptic talk.
For now, I just wish Wizards would be more honest. Either give us a real schedule for 2011 or tell us that they're having difficulties. Tell us what the worst-case and best-case scenarios are. Tell us if we might see a permanent trend to online content, or if 4th edition is really in decline.