On Sunday, Cult of Mac and Cult of Android will be kicking off our Mobile World Congress 2013 coverage.

The Android side of the Mobile World Congress will be — as ever — an orgy of new handsets and tablets of every conceivable screen size. Apple stuff will be limited to accessories and apps, and Killian Bell will be covering that for us over at Cult of Android.

But what is there to get excited about for Apple fans? I’ll be looking for Mac and iPhone-related news, and I wonder what the hell there’s going to be this year.

Since nobody wants to know what I think is coming next week in the world of iPad cases, lets take a look instead at how the rest of the mobile world could (or might not) predict the features of future iDevices.

Here are the new wallpapers in OS X Lion Developer Preview 3, released this afternoon. There are poppies, ducks, and an actual lion.

They come courtesy of it’s all tech, who bundled them up into a downloadable zip file (26.1MB).

Check them out:

This is new the login screen in Lion Developer Preview 3, which was just released this afternoon. And we also have a list of some of the biggest changes.

Apple has just released the third major Developer Preview of Lion, the upcoming update of Mac OS X.

The 1.07GB update is avaliable to registered Mac developers running developer preview 2 update 2.

There’s also an update to Xcode, which is now version 4.1. Developers must upgrade Xcode to 4.1 after installing Lion Preview 3.

We’ll have more details soon…