Yes, I do hope they take the plunge into full accelerated graphics support.
Fabfilter just made this switch in their products – all OpenGL / GPU enhanced. It seems to make things smoother. I think Waves also uses OpenGL calls in some of their plugins. OpenGL (instead of Microsoft Direct3d) being the cross-platform choice, so it’s likely we’d see this direction with Cubase if they adopt it.
I think it might even help some of those audio engine spikes, as there could potentially be less burden on the CPU when dragging objects and scrollbars far and fast, etc.
The current Mix Console UI reveals some redraw bugs on my system. No big deal, just certain parts of the interface don’t redraw correctly on mouse-overs (I have the latest drivers, etc.). A move to OpenGL would likely fix these kind of issues. But, it would move some of the problems, support and troubleshooting responsibility to 3rd party graphic card drivers.
I still think the benefits outweigh the risks. Modern video cards by AMD and Nvidia have very mature and stable drivers now (for the kind of simple 2d accelerated graphics calls Cubase would do).