Yes, you are right , Spending time with in app will reduce significantly in 2016. How? And Why? More and more apps are being published every year . But users have 24hrs in a day. Businesses know that user does not want everything which is residing in the app at particular point of time.
How User Experience is going to change this year?
Imaging your phone is locked, you received a message notification!! how about the functionality to read , reply , delete message from the notification center? Yes, Many of them have noticed you can do a lot more now with notification center itself. This is going to make communication faster, Will also reduce time spent with in mobile app. To prove my points here are some of my real time examples.
This is will reduce time app user spent with in app but on the other side app user will have a lot better user experience. Specially when all businesses wants you to spend time more and more with their mobile apps.
Biggest User experience change in 2016 would be “User interactions will not require new screens or redirection”