If he is able to all the remaining games (not a guarantee) and produces at the same ppg rate than he will finish with 47 points. So 49 is definitely possible, but the smart money is probably against it. He is producing at a .69 ppg pace, which over a full 82 game equals 57 points, pretty dang impressive.
For some reason I doubt that his point production will drop with Seguin's return. Will have to wait and see how serious his injury is though, hopefully just a game or 2.