I had an idea for a different type of home screen. I am not an app developer or have any knowledge - just wanted to share and see if something like this already exists. If it does, let me know!
You have the traditional dock, which launches the corresponding app - nothing special. However, if you double-tap the icon, it turns into a "tab" of widgets related to that app.
There are no other home screen panes to slide to, the main screen just "tabs" into relevant widgets.
I'm not sure if I have explained it well enough, or if anything similar already exists (if it does, let me know!) - but take a look at my sketch, and let me know what your thoughts are. Comments and questions welcome.