NFL.com's Steve Wyche was looking for breakout stars of 2010 who should be good in the future too. He mentioned a few big name players, including Green Bay Packers CB Tramon Williams. From NFL.com:

After his incredible performances in the playoffs, he's put himself among the rising stars at the position. Coaches and players will privately tell you that he's the best corner on the Packers. 

The thing that impresses me about him is that he keeps getting better.

When he made the team in 2007, he didn't look much better than the other undrafted defensive backs in camp. In 2008, he had improved but he still could get beaten deep. He was very good in 2009, but he also drew the nickname Admiral Armbar for his tendency to draw pass interference penalties. But last season, he was just as good and he only drew one pass interference penalty.

Then he took his game to a whole other level during the playoffs. It would not be a surprise if he's even better this season.