Touch features and Stylus writing are available. You would most likely use this on a tablet or phone, and not your laptop. Most laptops do not have touch screens, yet.
You will be able to edit PDF’s in Word, which is a pretty cool feature.
There are lots of enhancements to Excel, PowerPoint, OneNote, etc, but I wont get into them here. I am working on getting the preview of Office 2013 installed and working in my office, and will report more on new features later.
Look for a Fall release.