Judging solely from his YouTube highlights, he has similarities to a young (but taller) Rooney. He is fast, he is aggressive and appears to be ruthless in front of the goal. Of course, his goalscoring record right now seems phenomenal, but we have to keep in mind that (1) he is playing in Austria and (2) it is way to soon to conclude that he can keep this up. We all remember players like Michu in that amazing Swansea stint or Cissé when he couldn't stop scoring for Newcastle for a couple of months.
We should forget about his amazing goalscoring record for a bit and really look at his skills. As I said: He does seem fast and he does seem physical. He seems to prefer his left foot quite a bit. His dribbling and his first touch seem (slightly) above average, but I assume that his highlights on YouTube just omit technical errors as opposed to there not being any.
What I'm saying is: It's ludicrous for anyone who hasn't really watched him - me included - to be happy to spend 60M on him. That's what has gotten us in this mess: grossly overspending on players.
Does he look like a generational talent in his videos: I say no. He looks like a good young player with an amazing physique on an amazing run of form. I might be wrong - again I also haven't really watched him. But if I'm not even overly impressed (meaning that he is worth 60M, not meaning he isn't a good young player) by his highlights, I highly doubt that.