With the 13'' MBP just updated with Retina display it's just about time until the MBAs get it too. I'm just curious to know what do you guys think: are the non-Retina MacBooks (both Air and Pro) at risk of getting 'obsolete'? I'm not talking about 'feeling obsolete' but about the fact that newer app will be Retina-only? After the update of a few weeks ago whenever you open the Mac App Store the first thing you see now is the Retina-ready apps, when before those where not the first listed. Is there the possibility of future apps not being backwards compatible with non-Retina MacBooks (again, both Air and Pro)?