Today, you're still somewhat limited in what you can share among apps in the Apple iOS and Google Android worlds. Often, the limitation is as much due to the app itself as it is the OS.

I, for one, crave a multitasking experience that works as smoothly as it now does on my laptop or desktop--and that's something that, in theory, Microsoft Windows 8-based tablets and the apps written for Windows 8 Metro will bring to the table.

There are lots of cool apps created for iOS or Android, but the reality is those apps are locked into whatever mobile OS they were written for. The interoperability promise of Windows 8 is huge: Buy your app once, and use it on tablet, on laptop, on desktop.