Since Pimax hasn’t explained what they mean yet, I have a slightly odd suggestion.
A widget/hud system could be useful. Something where, regardless of what app or game you’re running, you could pull up an overlay with some preset information or screens. So, you could be watching a movie and get a message on Discord and rather than having to switch to the discord app (or switch to a desktop app and then open the discord app) you could just pull up you hud and have a screen with the discord app readily available. Or, you could be playing a game and have a browser open in your hud with various forums and builds ready and waiting.