Well, but doesn't it suggest itself to think of cuda bindings for QtConcurrent? Is it due to (L)GPL restrictions that this isn't done, or am I missing something here?

Ok, usually such cuda programs are highly optimised for the cuda architecture they are run on. But I can imagine general rules how one could at least set up some general rules for the translation of those qtconcurrent operations to the gpu.

Please correct me if i am wrong.