John Gruber offers up his WWDC 2009 Wrap-Up.
What struck me most was this:
This year, the emblematic session was titled â€œMac Programming for iPhone Developersâ€. Iâ€™m not even sure what to say about that, other than to confirm that anecdotal evidence suggests that new-to-Apple iPhone developers are indeed very much interested in developing for the Mac now, too.
On the whole, there was a palpable sense that the iPhone is a peer to the Mac in Appleâ€™s eyes. This isnâ€™t about counting how many sessions were devoted to each. Nor is it an indication that the Mac as a platform is slowing. Quite the opposite in fact â€” Apple is selling more Macs than ever, and, knock on wood, thereâ€™s a strong consensus amongst developers that Snow Leopard is going to be the best release of Mac OS X yet. Itâ€™s simply that for however fast the Mac is growing, the iPhone is growing far faster.
He goes on to say that by 2011 he thinks it’s going to be obvious that,
…the iPhone [will] supplant the Mac as Appleâ€™s primary platform.