Intel Threading Building Blocks shifted C++ parallel programming away from managing threads directly and toward expressing logical tasks that a work-stealing runtime maps onto available cores.
SYCL brought host code and accelerator kernels into a single standard C++ source model, evolving from an OpenCL-oriented abstraction into a multivendor programming standard for CPUs, GPUs, FPGAs, and other accelerators.
C++ began as Bjarne Stroustrup's attempt to bring stronger abstraction to C while preserving the efficiency and systems access that made C valuable.