Thanks @smth for clarifications! 

Really hoping for more unification  Since many detectron and other vision ops get pushed out faster in Caffe2 world

Additional questions:
5. How tied is the TorchScript or torch.jit to Python? I mean what happens if Julia people write bindings for PyTorch, will they be able to make use of torch.jit? If you load a model trained somewhere else, will PyTorch be able to optimize its execution as well?

Are there bigger plans for torch.contrib? Right now it seems to stay semi-secret