The 49ers ended their minicamp Sunday with a possible vision of the future. No. 1 draft choice Alex Smith rolled out and fired a touchdown strike to a sliding Derrick Hamilton, a second-year wide receiver who spent all but two games last season on the sidelines. Smith, in only his fifth 49ers practice, was running a two-minute drill. Granted, the drill was conducted with seven players on each side of the ball, so Smith didn't have to contend with blitzing linebackers or defensive linemen clogging passing lanes. Nevertheless, Smith's three-day stint was impressive. "It was good to see him take it down the field,'' coach Mike Nolan said of Smith's final drive of the day. "It was pretty clean."