Find My Mac
Finally, one added feature to iCloud is Find My Mac. A long time feature of MobileMe, which eventually became free is Find My iPhone. Find My iPhone allows you to locate your iOS device via GPS, send a message to it for display on the screen, have it make an alert sound so it can possibly be found, and/or remotely wipe it if you think you won't be getting it back. Now these features come to the Mac.
If you have a desktop Mac (iMac) this may not seem like much. Unless the computer is taken from your house what point is it? Do you really need to log into iCloud.com to see that your iMac is at your address where it should be? Sure, it is cool the first time or two, but do you really need this feature?
However, if you have a laptop this can be very handy. If the laptop is stolen or misplaced/left behind you can use Find My Mac to locate it and hopefully get it back. As with an iPhone or iPad, if you don't think it is coming back you can wipe the laptop and protect your personal data and files. Just being able to see if you left your laptop at work will be enough to make this a great tool to give someone piece of mind.
With Find My Mac, and the other features mentioned above iCloud is a great service for Mac users. When combined with iCloud and an iOS device you really get the full experience. Hopefully, this is just the start of iCloud and it will only get better and better.