It's a promising start, but he has a long way to go. He was playing in pre-season against what would have been a third or fourth string defence. He did brilliantly to see the space and exploit it, but now he's got to prove that he can do it repeatedly against a much stronger defensive setup.
For what it's worth, I think if he is given a chance and sticks at it he will make it, but I would expect it to take a couple of seasons - or a stroke of luck.