i cant justify "downgrading" to the ipad

my macbook air is so small, i actually zip it INSIDE a thin notepad "planner" , so i can handhold the thing onto planes, to meetings, etc


and of course the difference is the full pledged OS that allows me to do much much more than just simply browsing or relying on mobile-oriented apps

at almost no cost to dimensional or mass advantage:
mba11: 300 x 192 x 3-17 mm ; 650g
ipad3: 240 x 186 x 9.5 mm ; 1.08g