OSX

The eighth major release of OS X, Lion, arrived only a year after its predecessor, and the same was true with Mountain Lion. The expectation was therefore that we would see a preview build of OS X 10.9 in February or March and then a shipping date of July 2013.

However, pundit John Gruber claimed iOS 7 is "running behind" and engineers have been pulled from OS X 10.9 to work on that project.

On that basis, it's reasonable to expect the revision of Apple's desktop OS to be previewed at WWDC during the summer and the final release to appear later in the year, perhaps making its debut alongside a revised Mac Pro.

Although Siri's not quite the revolutionary feature that was once promised, it nonetheless continues to improve. It's now finally useful outside of the USA, and once you've trained it to your voice, Siri can be used to rapidly speed up many tasks.

Whenever that final release arrives (and whatever it's called — after all, there aren't many cats left for Apple to use), we're looking forward to its new features and changes. 

OS X already has plenty of built-in accessibility clout, and a number of different playback voices, and so it seems like a no-brainer to integrate Siri into the system.