I know that nobody knows for sure and all but why is the battery in the new MacBook only providing 9-10 hours of battery? While watching the keynote, I was sure the battery life was going to crazy when they said it only uses 5watts. I mean I know that there's that nice retina display to power but still.... If you look at the rMBP, it has a a bigger, more power consuming screen (from what they said in the keynote), it uses like 20-something watts...sure there is more space for the in the rMBP casing but... If we also think of the iPad Air 2 which is much thinner, it has about the same battery life... Am I the only one that finds it little strange?