X-Mirage - Mirror your iPhone screen to your Mac or PC, wirelessly.

Will this work for on-screen video sharing (webex, hangouts, skype)? If so, this is great for online meetings, training, etc.

Doesn't AirPlay do this already?

Allows you to wirelessly stream contents or mirror iPhone, iPad and iPod screen to any Mac/Windows PC. Record screen and audio from iOS devices, as well as voiceover via Microphone with one click. Also checkout Airserver , Reflector hunted earlier.

This app has horrible UX: it resizes its window and moves it to the center of your screen, no matter what size you want it at and no matter what corner of your screen you want it in. It thinks it knows better, which is the kiss of death for software. I do not recommend it!