I've seen it somewhat posted throughout the comments here but no thread on it directly. I figure the potential of this this deserves it's own thread and tutorial for those who are coming from Google to try and do exactly this without reading through a few threads.
How to enable Wide View on every app:
Download this app,G8x WideMode.
This puts a new icon in the top bar in the notification shade. If you don't see it, pull down twice and hit the pencil to edit the icons. Find the new one and place it somewhere near the top to keep it close by.
When the dual screen is open, tapping that will force wide screen in every app! There are some limitations:
Intent changes seem to revert the phone back to two separate pages. For instance, the mobile Reddit app Sync closes wide screen if I click any link to an external picture, video or site.
Some apps do f play nice in wide screen due to this, and you can't keep the phone permanently in the mode like a tablet, but it's a great improvement to a great phone idea.
This is super simple so I didn't think pictures were necessary, but let me know if I wasn't clear on anything or if you have problems somewhere!