Unless Harbaugh is going with him Smith isn't going to do a lot in KC. That said, there's some talent on that team and now that they won't necessarily be tempted to foolishly use that 1st overall pick on a QB they'll be able to add another big piece of the puzzle. Remember, these guys went 10-6 three years ago. That's a lot of time in football but some of that talent is still there.
What'll be interesting for me is what the 49ers do with those picks, I'd imagine they would consider packaging them to move up for the right guy or could use one on a guy they like and then do the old Ravens/Patriots trick of trading back for multiple picks. In any case, there's lots of flexibility available to a team that has been THIS CLOSE to winning it all in back to back years. They are going to be loaded up with talent one way or the other.