You guys realize core 2 duo is 2+ years ago processor that still ran on DDR2 along with OLD Intel architecture. So it's not just a 'refresh' from core 2 duo to a second gen i core aka sandy bridge like you would think. The guts of the MBA are completely upgraded. From DDR2 to DDR3 (not to mention rumored upgradeable this time up to 8gb up from max 4gb). The motherboard chipset is upgraded to work with the new processors increasing throughput from every interface such as SSD etc. And for those who thinks nvidia 320m is better than intel HD3000 then think again! Intel HD3000 is IN the i core with higher clock speed and much faster bus speed.
This 'refresh' will leave those with core 2 duo jealous cause it will be a much much faster notebook than you imagine.