I'm thinking CTRL + arrow keys as well as ALT + arrows keys could be changed with keybinds as sort of a gesture control to change between workspace's or bring up a variety of custom menu's or program shortcuts. I think BB4WIN's future resides in how well it pushes the envelope of combinations of interactivity, styling, and functionality combined with a performance mindful appeal. I think clever use of keybinds could defiantly improve the appeal of the GUI shell a lot of users. Is there a way to even make a plugin to assign a keybind combination and then search for a program to assign to it perhaps? Like maybe I want to use ALT or CTRL + number keypad keys to launch assignable programs.
That dock on the right side in the first screenshot. Could those numbers be assigned in that way for example? That would be handy right? I can't help, but think those would be really cool if you could hover over them and if enabled for the assigned slot it would have a rollover menu that can be customized like for the reddit icon it could bring up a list of reddit links to launch or spotify a list of play list links. You may wish to consider taking queues of inspiration from NovaLauncher with it's icon customization for that right hand side dock.
What I feel would be great is even further interactive and stylized GUI design packed into BB4WIN. I could see a point in time where it's used with VR/AR as a GUI to interact with all types of programs both within them and outside of them and controlling the programs themselves in a highly customized and optimized to taste for performance or quality minded manner. Anyway I'll take a look at this sometime in the near future and see what's under the hood with it going on. I have to say it's look great on style.
A nice step in a new direction would be support for turning the dock and menu's into customizable stylized 3D GUI's. That kind of falls in place with what I said about VR/AR as well. Perhaps that's a future consideration for the shell? How awesome would that be especially if the menu's and dock's could emit projected lighting reflections on the desktop. Someday BB4WIN will transcend into a pixel perfect interactive GUI state of Nirvana.