Here's what I gathered so far on the new Airs, apologies if I missed anything or got something wrong: Good: More RAM - up to 4GB. At last. Flash storage across the range - faster to resume from sleep, faster in general 11.6" also available - at least there is a choice of sizes Beefier graphics chips - will now drive the 27" Cinema Display natively Stereo speakers Glass Trackpad - though you may not prefer it Higher resolution displays +1 USB port Improved battery life (TBC) Reduced thickness and weight Not So Good: No more backlit keyboard No more bundled USB>Ethernet adapter Still got display port/audio out/magsafe on different sides of the chassis Unknown: Have they fixed the hinge problem? Have they improved the cooling design? Are the edges still quite sharp on your wrists? Is the display fully glossy or like the old ones? - the only compelling feature for me over my revC is the 4Gb RAM. Not worth the cost of upgrading.