He's an old geezer, so there will be NO change in the Catholic Church.
It will be business as usual.
My guess is is that despite JP2 fading over the last 5 or more years, they weren't quite sure what to do when he finally died, or which direction they want to go. Electing Ratzinger is basically a carbon copy of JP2 in terms of outlook. Essentially they just elected another JP2.
I figure that they figure he's good for another 5 or 10 years during which time they (the cardinals and the church brass) will have time to study where they hell the church is headed. Should it be the status quo (pervert priests and bank scandals) or should it be reform? During the next 5 to 10 years younger men will emerge on both sides of the issues (left and right). Undoubtedly, the politicing has already begun for the next pope.
This guy is just a transition guy.