Where the iPad shines is in unique ways where the device disappears to perform a unique task. Lux Optics, makers of the well-regarded Halide camera app, has enabled iPad users to transform their devices with Orion, an app that turns your iPad into an HDMI monitor.
Orion is just so handy. I most recently used it to install Windows on a machine that I planned to run without a display. It worked flawlessly.