I guess Johansson must have improved quite a bit from last year. He seems steadier now, will come to net occasionally, and is mentally tougher, as evidenced by his match against Roddick last week. He didn't cave in after losing the first set 6-3, but instead took Roddick to 9-7 in the 2nd set tiebreaker.
He reminds me of seeing Carlos Moya at the '96 U.S. Open, when I had never even heard of Moya, let alone see him play. I was like, "Who is this guy with his long hair and rock star look with a big forehand?". Well, less than 6 months later he was in the Australian Open final against Sampras, and less than two years later, he wins the French Open.
We'll see what Johansson can do in the future. He definitely has the talent. The question is: Can he put it all together at the right time?