Today Apple dropped new Mac Mini, iMac, and Mac Pro desktops, and Airport Extreme, and Time Capsule routers. Previously, we’d heard rumors about Apple waiting and holding one of their Special Events on March 24th, a “Spotlight Turns to Desktops” to bookend last fall’s “Spotlight Turns to Laptops” event. But none of today’s releases were as new or event-worthy as the unibody MacBooks announced last year, were they?

So, if Apple really is having a March 24th event — and it’s not just some interfanboynet make believe — what’s left for them to announce?

Well, March 2008 was the iPhone SDK Roadmap Event, where Apple began the process that ultimately led us to iPhone OS 2.0 and the App Store.

Could March 2009 give us a similar peek into the beginning of a beta process for iPhone OS 3.0? Could it show off an App Store-level complication on the order of an iPhone HD or iTablet, requiring the months before WWDC and an eventual summer release be spent testing new resolutions or screen sizes, or other hardware changes bound for the iPhone 2,1 model?

As stated explicitly in the title, pure and abject speculation at this point, but Apple does seem to like product cycles and symmetry…

What do you think?

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Speculation Alert: Does This Mean March 24 Will be iPhone 3.0 Beta? iTablet? What?!