With the release of HD 4000, I'm hearing a lot of news from friends who own this laptop that it can actually pass as a decent gaming laptop. Even for someone who doesn't care that much about gaming, I know it is probably one of the most hardware-taxing activities out there. How does the 2012 MBA compare to the 2011 MBP? I was at the apple store and ran a little test where I have a dynamically changing wallpaper (every 5 seconds) and launchpad open. The 2011 MBP Lags when swiping between launchpad pages while the background is changing behind it. The 2012 MBA does not. I know this is probably one of the poorest benchmarks a person can conduct, but is the MBA really this close to MBP performance? How good is the HD 4000 vs a nvidia 320m?