I personally think the new rMBP's and the Airs have decent battery life. Sure it could always be better, but I'd like to see some advancement in the speed at which a battery charges. I charged my 13" rMBP from a 5% charge this morning and while I wasn't timing it exactly, I know it took over two hours to fully charge. How nice would it be to come home with a MacBook that's almost dead, plug it in and by the time you're out of the shower it's fully charged and ready for another 8 hours of use? Am I the only one that thinks they charge way too slow?