As I mentioned pre-WWDC' 13, if Windows laptops can give more than six hours of battery life, how much can an Apple laptop give, now we have the answer from a variety of reviews, anywhere from 10 hours to 13 hours to even 14 hours. Now lets see how much battery life Macbooks can give with Mac OS X mavericks, with all its power saving features.
Another point that Walt points out is that, laptops now have the same battery life as tablets (ok now compare iPad to Macbooks and Windows laptops to Android tablets, then you are comparing apples to apples, get it?). Will this change the user preference and will the usage pattern change? It certainly will be a very interesting rest of the year for Apple, with lot of interesting products expected, including new Macbook Pros.