In case you're not familiar with Google Cloud Print as it is fairly new, it's a lot like Apple's AirPrint. The free service allows users to print content from any web, mobile or desktop app that supports Google Cloud Print.
So far, the apps list is rather limited to the Google suite such as Gmail and Docs. However, the connection between the printer and the app is made through the cloud and pairing the app with the printer using a Google Account.
Right now, the only printers that support this function are HP ePrint-enabled devices (i.e. HP Photosmart, HP Officejet, etc.). There are no messy wires, drivers or software to install, and the service could be set up with the closest HP ePrint device available.
This definitely makes printing solutions for both home and small business purposes a bit easier. Many printers are being sold on the Wi-Fi-enabled selling point, and on paper, the cloud-based solution does seem even better - at least if you're only printing Google Docs and e-mails. HP has cornered itself a nice deal for the moment, but surely other printer manufacturers should jump on this feature soon enough.