If you are a user of Chrome or Safari as your web browser and use presentation software such as SlideShare, Google Docs Presentation, or PowerPoint, then you have the ability, through a Chrome Web store App and a Phone App to turn your phone into a presentation remote. You can see the presentation below and visit Presentation Remote for more information.
free app de Modo for either Android devices or iPhone Devices. What is cool is that this same app will work with Pandora Radio and with YouTube where you can turn your phone into a remote control for YouTube. In another way through this app your phone can serve as a monitor extension as well and the ability to drag and drop from your phone to your computer, just as if you had a secondary monitor.
I am not quite an avid user of Google Chrome over Firefox, not really sure why, but it appears that the apps available for Chrome might make it worth a switch. This is just one example.