[chaboud]

No. ImGUI could not be the future of GUIs.

GUIs are multi-process, multi-system, multi-clock, multi-network entities, or at least they have the potential to be. Immediate Mode GUIs are almost non-scalable by design.

Imagine a multi-system asynchronous AR collaboration environment. Now imagine that as an Immediate Mode GUI. If we had enough horsepower to do that, we'd be doing something far better with it.