Yeah, we all know that George Clooney guy has had a horrible career, it just totally crashed and burned after he did Roseanne and ER.
Or that Leonardo DeCaprio kid, he's had no success whatsoever.
Those are two examples. There are probably a lot more, but there are most likely just as many people who can't make the transition. I bet you this guy won't become George Cloony or DiCaprio (and I'm not really fans of them, but they are definately famous and decent at what they do). Its nothing against him, I just don't think he'll be doing too much stuff after Arrow unless he's a really good actor, which I doubt. Like i said, I'm willing to watch and hopefully be surprised.