I doubt it. I don't think Haswell alone is going to make up the difference and I doubt those claims for Haswell chips are going to be what's actually produced/used in laptops. It was more like "hey, look what we CAN do" Retina will have to get more efficient to maintain if you're going to put it in a thin/light device and expect to maintain the same size/weight/battery life. The good news is, there is progress being made here. I only wish battery chemistry/density would evolve even half as fast. There hasn't been any significant strides in battery's for consumer devices since Lithium Ion/Polymer. They've gotten better over time, but at a very slow pace.
So what is your approximation for retina Air?
Based upon what you say is even late 2014 feasible? Or more like mid-late 2015?