Here's a neat little feature that Microsoft has slipped into the new Windows 10 Technical Preview for phones. In Windows Phone 8.1, shutting down the phone gives you the simple, albeit pleasant "goodbye" message. But when you shut it down in Windows 10, you'll get a little reminder of your next calendar appointment.
The exact message reads:
"In case you forgot...(Appointment name, time, location)"
Not the most important new feature in the preview for everyone, but it's a really nice touch. If you're shutting the phone down you won't get your reminders on appointments, but at least with this you'll get a helpful reminder before hand.
For more on the Windows 10 for Phones preview, be sure to visit the Windows Central Forums!
Thanks Mahmoud for the tip!