Multiple Snap Views in Windows 8.1 are now fully enabled. OneNote now also supports the Share Charm in 8.1, letting you copy a website or information from an app directly into a new note in the app.
Most significant is a new Camera Scan feature and optical character recognition (OCR). The updated feature offers improved scanning of documents and whiteboards so that images look like they were scanned directly into a page.
Camera Scan automatically rotates, straightens, crops, sharpens, and remove shadows from images after they’re taken so they fit into a note.