Re. running third-party apps...
I've only skimmed through this thread, so apologies if this has already been mentioned... But, if you watch the keynote again - specifically the part where Steve talks about the OS and 'solid foundations, etc.' - you'll see that he clearly emphasizes that the benefits of using OS X are that it enables them "to write apps; it's got cocoa; it's got core animation built-in...it's got all the stuff we want". Maybe it's just me, but I take from that that it's going to be opened up to wider development.
I've only skimmed through this thread, so apologies if this has already been mentioned... But, if you watch the keynote again - specifically the part where Steve talks about the OS and 'solid foundations, etc.' - you'll see that he clearly emphasizes that the benefits of using OS X are that it enables them "to write apps; it's got cocoa; it's got core animation built-in...it's got all the stuff we want". Maybe it's just me, but I take from that that it's going to be opened up to wider development.