Having had 6 Macs now... (7 if you count the Hackintosh)
I have truly discovered I don't really like the OS on them. I tolerate it on the Dell Mini9, since it works better than Linux did on it, at the time.
Hardware, another issue all together, I like the hardware Apple makes. But getting Linux on them is a very tricky and keeping it on there is a serious challenge as well, especially if you Dual boot them. (OSX/Linux)
This Hackintosh is getting long in the tooth. I'm not un-happy with it, just that AJAX webpages drag...
As far as Airbooks or iPads... nope ain't gonna happen with me. To big of a format. I like the 9"-10" format with a keyboard.
Like the Dell Mini9 keyboard is AWESOME... it ain't... if I like the Dell Mini9, I can put up with the crappy keyboard on the "Surface"... Plus if I can get Linux on the damned thing and buy it for a reasonable price... even partially subsidized by M$... all the better.