And to make it all work, Microsoft outfitted the Surface Pro 4 with a new, in-house co-processor known as the G5, which handles the display/stylus interaction. The button on the Surface Pen can still be used to quick-launch OneNote, and now Cortana as well. Best of all, though, the stylus comes in five colors and magnetically attaches to the side of the Surface Pro 4, so you might notice you've misplaced it that much sooner.

Get all the news from today's Microsoft event right here.