They didn't have to; read below. This is posted in another thread from me Mike.
● New graphics framework ○ In order to streamline graphics drawing SONAR X1 has a new
framework (graphics engine) to handle all graphics drawing operations
○ This framework abstracts the work of drawing objects minimizing
kernel use, thereby reducing glitches even when navigating large
projects in the UI
○ We built a new graphics layer for the future which allows for the best
possible rendering on various OS versions and affords the use of
modern graphic primitives.
○ The benefit is manifold. Easier to code, easier to debug, and nice to
look at.
○ We’re taking advantage of several things that were a bit challenging
to render previously. A few examples are anti-aliased rendering of
many different types of geometric shapes (both outlined and filled),
alpha blending, gradients, etc. in many places.
○ We’ll be bringing more and more UI code into the future.
The above is from the fineprint PDF of Noel Borthwick.
This could be all they mean about what is in X1.
I may be totally wrong in thinking CUDA was implemented.