Ben Bajarin:

Overall, Apple is continuing their trend of adding new and useful features on an annual basis. But more importantly, in the grand scheme of things, OS X Mavericks represents Apple’s commitment to innovate uniquely for different form factors. Apple has drawn a line in the sand and stated with their actions that they believe software for the PC is different and should be treated different than software for tablets and smartphones.

In other words, the total opposite of what Microsoft is trying to accomplish.

Thank goodness.