I am dead set to purchase a MacBook Air in the near future. I've seen the MacBooks and tried it out in the Apple Store, but it's heavy for me and has external features I don't need. The Air has the thin and light feature that makes this laptop excellent for taking around. I've deeply read into it, and the Air is for me. Anyway, my question was- for future OS updates, and even totally new Mac OS's, will the MacBook Air keep up with the OS? Leopard on this thing is pretty quick, from what I've tested at the Apple store. But in the future, I'm concerned for new Mac OS's, and that the MacBook won't be able to handle it for it's low specs. If Apple does come out with a new OS in the future, do you think the Air will keep up with it and perform quickly as it does with Leopard? Additionally, will Vista run ok as a dual boot for the Air? (again, low specs) Sorry for sounding so confusing. I've been a PC user for years, and I am finally making the switch, because I'm sick of using a PC. I have VIsta on my XP laptop and it drives me nuts! It's like pulling individual hairs painfully off your head! Thank you for your help! I greatly appreciate it!