You can now use an iPad as a monitor for a Windows PC
Duet Display has been transforming old iPads into fast MacBook displays for months now, but it’s turning its attention to the Windows world today. For just $9.99 you can download Duet and use an iPad as a monitor on a Windows PC. There’s no complex setup, and it’s really just plug and play to turn the iPad into a monitor.
Source:: The Verge

