Well, CUDA-capable is pretty vague. Other vendors could probably go ahead and implement it (technically). Its not like nvidia hardware is made from rainbows and sunshine dust.
Then again, i don't really feel GL is good place to cram such features, id rather it was put elsewhere.

It was already shown before that such stuff is doable (i think Hoppe from ms did some research on svg rendering on GPU some time ago) and is certainly pretty need thing to have (Inkscape with this in backend would be pretty cool).