Kara Swisher and Walt Mossberg hosted the 8th All Things Digital conference this week, and the guest list was a veritable who's who of leaders in the tech sector and business visionaries.  Just about every tech big-wig not named Gates was there.  Steve Jobs, making his first appearance since 2007, spoke with Swisher and Mossberg about the big product development story of the year: the iPad.  And he explained why and how the iPad took a back seat to the iPhone, even though it was in development first (also in this clip: Jobs shares his hopes for the future of the news business and the iPad's potential role in media):

Note toward the end of that clip, Jobs talks about the coming post-PC world.  And it doesn't sound like he thinks it is too far off.  Microsoft's Steve Ballmer, doesn't see things quite the same way.  In fact, he told Swisher and Mossberg that he sees the iPad as "just another PC" itself:

For more excerpts of Steve Jobs discussing all things Apple at the All Things Digital conference, click here.  

For more Steve Ballmer, click here.