http://www.androidauthority.com/fitbit-blaze-fitbit-alta-get-accessory-updates-713238/
it seems blaze and alta will get updates for 3rd party apps notification..
hopefully Charge 2 will have these features when shipped..
awesome! personally i think just need some software update ... (via Fitbit app?)
found another article ... think Charge 2 is able to display ... but fitbit is not saying as yet
http://www.wareable.com/fitbit/fitbit-charge-2-review
Fitbit Charge 2: Notifications
The Charge 2 isn't a smartwatch and it's not trying to hide this fact. While you'll get notifications, you can't reply to them or review them on the fitness tracker – they simply disappear.
Call, text and calendar notifications can all be displayed on the Charge 2 but your phone must be nearby.
It's unclear right now if the tracker is able to display third-party notifications from social media.
Read next: Which Fitbit should you buy?
When receiving a call or text, the Charge 2 buzzes briefly then shows the phone number (and/or name) of the person calling. Texts show a clipped version if the message is long, and emojis can't be seen at all.
Other notifications you'll see include reminders to move, which debuted on the Fitbit Alta. It's the same concept where every hour you'll get a little message telling you to take 250 steps.