Although the current trend is to have a smartphone with a large screen that almost looks like an ironing board, it's still much more comfortable to use a computer with a mouse and keyboard. That's why somebody has come up with Vysor, an app to control your phone and tablet from a PC.
Your phone screen on your computer monitor
Basically, this app recreates your phone screen on your PC desktop. It does so without cables, via Wifi, and providing support for mouse gesture controls and keyboard commands.
Ideal for presentations on your PC and Mac.
Very useful if you're working on your computer or you find it uncomfortable to handle a smaller screen when at home... but also appropriate to share information with a larger audience: at the end of the day, it's just an app to mirror the screen of your mobile device.