One of the cable tabs on my MagSafe charger for my MacBook came undone, so I took this as a sign to retire the charger to home use and to purchase another for travel. When I went to my local Best Buy, they had two chargers for sale, 60W and 85W, that looked the same size, sold for the same price, etc. The only difference was that the 85W supported the MacBook Pro, while the 60W only supported the MacBook.
Even though I am a MacBook owner, I figured I might, sometime in the future, purchase a MacBook Pro and I went with the 85W charger. When I opened it up I found it was slightly larger than the 60W charger it was replacing, but for all intents and purposes there's no real difference between the two. So why does Apple sell a 60W replacement (or even manufacture the 60W at all)? Are there enough people that want to save 25W?