IT2? You're having me on!
This semester I've done a course called 'Computer Graphics'. Next year, I'll be doing 'Advanced Computer Graphics'.
Simple fact of the matter is: graphics is full of vectors. Vector units are optimised for vector calculus, CPUs for integer addition.
So guess which is faster at vectors?
Vector units.
Since a hardware implementation can always be made faster than software, don't you think vector units mean hardware acceleration?