Except that it is ongoing in several other places already. Besides, ATM, we know what is needed to get it all working, but unfortunately, it is a non-trivial task. It involves rewriting the rendering engine basically from scratch, a task that is necessary, but will most likely involve a rewrite of significant parts of the entire engine. So, in summary, it is something that will take a long time yet, unless some OpenGL wizard joins the team.
Now, getting the HUD gauges fully modular, and fully retargetable, will take some time, and could even be done in the current engine, but it takes coders, of which there aren't many.