i'm looking to get the current 11" once the refresh came out, but now contemplating if i should just get the new one. how much of a battery life improvement will we see with this combination? i read that SB is more power efficient, but what about Lion? will we see a higher capacity battery cell also? if the new MBA can reach at least 7hrs, then i'll be at the 5th Ave. NY store day one. also, how low will the current MBA 11" (4gb model) price go?