I already use OneNote on my Android phone, Mac computer, and Windows tablet. I love the desktop version for longer planning sessions and researchy stuff. The phone is really good for quick notes, ideas, and stuff I will do later...

That said, I hope they build this into OneNote as it is hands down the best "brain capture" software I have ever used. Keep it up MSFT, you are kicking ass!

Edit to add: The only thing missing from OneNote is notifications. I can and do make todo lists all the time. I just need notifications on all platforms. Until then, I will keep using Google Calendar and Inbox for gmail.