Routine apps: For everyday use like web surfing, office docs, I am guessing you will be hard pressed to find any difference between the Core 2 Duo equipped 2010 MBAs the 2011/2012 models. Video: I believe the newer models are better at handling flash, HD videos, youtube and Netflix. My 2010 struggles a bit here with loud fan noise. Battery: I am not sure about battery life though. Do the C2D machines consume less battery than the i3,i5,i7 models? Heat and noise: Do the 2010 models have an advantage here? My 13" 2010 MBA with 4GB RAM runs very quite and doesn't generate heat at all during normal usage. Only video playback causes it to struggle some. What do you guys think? Will appreciate inputs from owners of both the older and newer MBAs.