Some apps require a little extra work to make things play nice with the Superbook. Some just don't work.
See below for details.
Good News[]
Dashlane[]
In the settings for Dashlane, there is an option to "Allow Screenshots." With this turned on, the app will also use the Superbook screen.
Bad News[]
Netflix[]
This doesn't work at present.This is due to a current hardware limitation, which was discussed in Update #39 on Kickstarter. A software workaround will be looked at in future following completion of delivery.