I just got my 13 Air with i7 in production, using VMware Fusion 4. It's plenty fast, and the 900 top to bottom resolution is significant over our older MacBook 13 with lower resolution because I can better manage remote systems.
Originally Posted by Jellotime91
Virtualization performance is noticeably better where differences are Fusion 4 vs 3, i7 1.8 vs Core 2 Duo 2.2, same 4 GB, SSD vs 7200 RPM drive.
The funny part of Windows working well is I can love or loathe the best and worst of both operating systems.
The biggest reason against an Air purchase that I can see is we'll have first tier Ultrabooks as competition very soon. If you use apps like iMovie and GarageBand you will get some value out of any premium Apple charges.