It should be possible to use different backgrounds in different tabs in samsung phones. Maybe it already is and i just don't know how to do it, but it seems incredible obvious considering the amount of apps we have in our phones today.
This would allow us to visually identify better groups of apps we use.
I have business apps, I have yoga and meditation apps, I have games, I have daily apps, weather and surf apps, social media apps. In my mind this are groups that I separate in tabs, but being able to change the background of each tab would be visually much better.
There is a lot of things you could do with this in terms of UX.