The iPad is a very capable tablet on its own, but it can serve as a beautiful second display for your Windows PC thanks to the Luna Display. This is a smart gadget that lets you connect via WiFi or USB and enjoy your favorite PC apps on your tablet. It supports full touch and external keyboards.
Luna not only supports iPad gestures but works well with Apple Pencil. It is compatible with Windows and Mac computers. You can find out more about it on Kickstarter.