Mobile Me from Apple does this, doesn't it?
Keep the information on your iPhone, iPad, Mac, and PC in perfect sync without docking or fussing with cables. MobileMe automatically pushes new email, contacts, and calendar items over the air to your devices, so you always have the latest information at your fingertips. You can share photos and access important files from anywhere. And if you ever lose your iPhone or iPad, MobileMe can even help you find it.
Cloud is bigger than just syncing your own info. Think google maps vs. bing maps...gmail vs hotmail.